diff --git a/backend/app/api/kline.py b/backend/app/api/kline.py
index be3d12f..1bc5d49 100644
--- a/backend/app/api/kline.py
+++ b/backend/app/api/kline.py
@@ -579,7 +579,10 @@ def refresh_views(request: Request):
 
 @router.post("/sync_minute")
 async def sync_minute(request: Request):
-    """手动触发分钟 K 同步(全市场)。返回 pipeline job_id 可轮询进度。"""
+    """手动触发分钟 K 同步(全市场)。返回 pipeline job_id 可轮询进度。
+
+    body 可选: { "days": int } — 指定拉取天数 (不传则用偏好设置)。
+    """
     import asyncio
 
     from app.services.pipeline_jobs import job_store, release_run_slot, try_acquire_run_slot
@@ -594,6 +597,16 @@ async def sync_minute(request: Request):
     if not _minute_allowed(capset):
         raise HTTPException(status_code=403, detail="需要 Pro+ 权限")
 
+    # 可选 body: { "days": int, "extend": bool }
+    # days: 拉取天数; extend: 向前扩展模式 (从最早数据往前补)
+    body = {}
+    try:
+        body = await request.json()
+    except Exception:  # noqa: BLE001
+        pass
+    override_days = body.get("days")
+    extend_flag = body.get("extend")
+
     job_id, is_new = job_store.create()
     if not is_new:
         return {"status": "reused", "job_id": job_id}
@@ -622,10 +635,21 @@ async def sync_minute(request: Request):
                     pass
             progress("sync_minute", 10, f"标的池 {len(universe)} 只")
 
-            days = get_minute_sync_days()
+            days = override_days if override_days else get_minute_sync_days()
+            # extend=1 → 向前扩展; days>=365 也自动向前扩展
+            extend_backward = bool(extend_flag) or days >= 365
+
+            def _on_chunk(done: int, total: int, seg_label: str) -> None:
+                # 进度映射: 10% (标的池解析完) → 95%, 留 5% 给写入+刷新
+                pct = 10 + int((done / max(total, 1)) * 85)
+                progress("sync_minute", pct, f"拉取分钟K… {done}/{total} 批 [{seg_label}]")
 
             def _run():
-                return kline_sync.sync_and_persist_minute(universe, repo, capset, days=days)
+                return kline_sync.sync_and_persist_minute(
+                    universe, repo, capset, days=days,
+                    extend_backward=extend_backward,
+                    on_chunk_done=_on_chunk,
+                )
 
             written = await loop.run_in_executor(_long_task_executor, _run)
 
@@ -646,6 +670,79 @@ async def sync_minute(request: Request):
     return {"status": "started", "job_id": job_id}
 
 
+@router.post("/sync_minute_single")
+async def sync_minute_single(request: Request, body: dict):
+    """手动拉取单只股票的分钟K并落库 (前复权)。
+
+    body: { "symbol": "000001.SZ" }
+    用于个股分时图"获取数据"按钮: 本地无数据时单独拉取并持久化。
+    """
+    from app.services.preferences import get_minute_sync_days
+    from app.tickflow.capabilities import Cap
+
+    symbol = body.get("symbol", "").strip()
+    if not symbol:
+        raise HTTPException(status_code=400, detail="symbol 不能为空")
+
+    repo = request.app.state.repo
+    capset = request.app.state.capabilities
+
+    if not _minute_allowed(capset):
+        raise HTTPException(status_code=403, detail="需要 Pro+ 权限")
+
+    days = get_minute_sync_days()
+    loop = asyncio.get_event_loop()
+
+    def _run():
+        return kline_sync.sync_and_persist_minute([symbol], repo, capset, days=days)
+
+    written = await loop.run_in_executor(_long_task_executor, _run)
+
+    # 刷新视图
+    from app.jobs.daily_pipeline import _refresh_single_view
+    _refresh_single_view(repo, "kline_minute")
+
+    return {"status": "ok", "symbol": symbol, "rows": written}
+
+
+@router.post("/clear_minute")
+async def clear_minute(request: Request):
+    """清空全部分钟K数据 (仅 kline_minute, 不影响其他数据)。
+
+    删除 data/kline_minute/ 下所有分区 parquet, 刷新视图。
+    需二次确认: body { "confirm": true }。
+    """
+    import shutil
+
+    body = await request.json() if request.method == "POST" else {}
+    if not body.get("confirm"):
+        raise HTTPException(status_code=400, detail="需传 confirm: true 以确认清空")
+
+    repo = request.app.state.repo
+    minute_dir = repo.store.data_dir / "kline_minute"
+
+    # 统计待删除行数 (用于返回)
+    removed = 0
+    if minute_dir.exists():
+        try:
+            result = repo.db.execute("SELECT COUNT(*) AS cnt FROM kline_minute").fetchone()
+            removed = result[0] if result else 0
+        except Exception:  # noqa: BLE001
+            pass
+        # 仅删 kline_minute 目录, 绝不触碰其他目录
+        shutil.rmtree(minute_dir, ignore_errors=True)
+
+    # 刷新视图 (重建空视图)
+    from app.jobs.daily_pipeline import _refresh_single_view
+    _refresh_single_view(repo, "kline_minute")
+
+    from app.api.data import invalidate_storage_cache
+    invalidate_storage_cache()
+
+    logger.info("minute K cleared: %d rows removed", removed)
+    return {"status": "ok", "removed": removed}
+
+
 @router.post("/extend_history")
 async def extend_history(request: Request):
     """向前扩展历史日K数据 — 独立于盘后管道。
@@ -886,195 +983,3 @@ async def rebuild_enriched(request: Request):
 import concurrent.futures as _cf
 _long_task_executor = _cf.ThreadPoolExecutor(max_workers=2, thread_name_prefix="long-task")
 
-
-@router.post("/extend_minute_history")
-async def extend_minute_history(request: Request):
-    """向前扩展分钟K历史数据 — 仅拉数据,不做任何后续处理。
-
-    body: { "value": int, "unit": "day"|"month" }
-    - day 单位:1~15 天(所有有分钟K权限的套餐可用)
-    - month 单位:1~6 月(每月按 30 天计,即最多 180 天)—— 仅 Expert+ 可用
-    返回 job_id,可轮询 /api/pipeline/jobs 查看进度。
-    """
-    import asyncio
-    import traceback as _tb
-    try:
-        body = await request.json()
-        value = body.get("value")
-        unit = body.get("unit", "day")
-        if not value or value <= 0:
-            raise HTTPException(status_code=400, detail="value 必须为正整数")
-        if unit not in ("day", "month"):
-            raise HTTPException(status_code=400, detail="unit 只支持 day/month")
-
-        repo = request.app.state.repo
-        capset = request.app.state.capabilities
-
-        from app.tickflow.capabilities import Cap
-        if not _minute_allowed(capset):
-            raise HTTPException(status_code=403, detail="需要 Pro+ 权限 (batch minute K-line)")
-
-        # month 单位(按月扩展更长的分钟K历史)仅 Expert+ 开放;Pro 仅可用 day
-        if unit == "month":
-            from app.tickflow.policy import tier_label
-            base_tier = tier_label().split()[0].split("+")[0].strip().lower()
-            if base_tier != "expert":
-                raise HTTPException(
-                    status_code=403,
-                    detail="按月扩展分钟K历史需要 Expert 及以上套餐",
-                )
-
-        # 计算天数上限:day 最多 15 天;month 最多 6 月(180 天)
-        from datetime import timedelta
-        if unit == "month":
-            total_days = min(value * 30, 180)
-        else:
-            total_days = min(value, 15)
-
-        if total_days <= 0:
-            raise HTTPException(status_code=400, detail="扩展范围无效")
-
-        from app.services.pipeline_jobs import job_store, release_run_slot, try_acquire_run_slot
-        from app.api.data import invalidate_storage_cache
-
-        job_id, is_new = job_store.create()
-        if not is_new:
-            return {"status": "reused", "job_id": job_id}
-
-        async def task() -> None:
-            if not try_acquire_run_slot():
-                job_store.fail(job_id, "已有数据任务在运行(或上一次任务卡死未结束),请稍后再试")
-                return
-            loop = asyncio.get_event_loop()
-
-            def progress(stage: str, pct: int, msg: str,
-                         stage_pct: int | None = None, skip_log: bool = False) -> None:
-                job_store.progress(job_id, stage, pct, msg,
-                                   stage_pct=stage_pct, skip_log=skip_log)
-
-            try:
-                job_store.start(job_id)
-                # 获取当前最早日期
-                earliest = repo.earliest_minute_date()
-                if not earliest:
-                    # 本地无分钟K数据 → 以今天为基准往前获取
-                    from datetime import date as _date
-                    latest = _date.today()
-                else:
-                    latest = earliest
-
-                new_start = latest - timedelta(days=total_days)
-                if new_start >= latest:
-                    job_store.fail(job_id, "扩展范围无效")
-                    invalidate_storage_cache()
-                    return
-
-                start_str = new_start.strftime("%Y-%m-%d")
-                end_str = latest.strftime("%Y-%m-%d")
-
-                progress("extend_minute", 5, "解析标的池…")
-                universe = _resolve_minute_universe(capset, repo)
-                progress("extend_minute", 8, f"标的池: {len(universe)} 只")
-
-                from app.tickflow.capabilities import Cap
-                from app.tickflow.rate_limits import resolve_limit
-
-                limit = resolve_limit(
-                    capset,
-                    Cap.KLINE_MINUTE_BATCH,
-                    default_batch=100,
-                    default_rpm=30,
-                    default_rpm_when_unset=False,
-                )
-
-                def _run():
-                    """全部在 executor 线程里完成,避免阻塞事件循环。"""
-                    from app.services.kline_sync import sync_minute_batch
-                    from datetime import datetime as _dt
-
-                    def _chunk(cur: int, tot: int) -> None:
-                        progress("extend_minute", 8 + int(85 * cur / tot),
-                                 f"分钟K 批次 {cur}/{tot}", stage_pct=int(100 * cur / tot), skip_log=True)
-
-                    df = sync_minute_batch(
-                        universe,
-                        start_time=_dt.combine(new_start, _dt.min.time()),
-                        end_time=_dt.combine(latest, _dt.min.time()),
-                        batch_size=limit.batch, rpm=limit.rpm,
-                        on_chunk_done=_chunk,
-                    )
-
-                    written = 0
-                    day_count = 0
-                    if not df.is_empty():
-                        import polars as pl
-                        df = df.with_columns(pl.col("datetime").dt.date().alias("_trade_date"))
-                        for day_df in df.partition_by("_trade_date"):
-                            trade_date = day_df["_trade_date"][0]
-                            out = repo.store.data_dir / "kline_minute" / f"date={trade_date}" / "part.parquet"
-                            out.parent.mkdir(parents=True, exist_ok=True)
-                            if out.exists():
-                                existing_df = pl.read_parquet(out)
-                                if "datetime" in existing_df.columns:
-                                    existing_df = existing_df.filter(pl.col("datetime").is_not_null())
-                                day_df = pl.concat([existing_df, day_df.drop("_trade_date")]).unique(
-                                    subset=["symbol", "datetime"], keep="last",
-                                )
-                            else:
-                                day_df = day_df.drop("_trade_date")
-                            day_df = day_df.sort("symbol", "datetime")
-                            from app.services.kline_sync import _atomic_write_parquet
-                            _atomic_write_parquet(day_df, out)
-                            written += day_df.height
-                            day_count += 1
-
-                        # 刷新视图
-                        d = repo.store.data_dir.as_posix()
-                        try:
-                            repo.db.execute(
-                                f"CREATE OR REPLACE VIEW kline_minute AS "
-                                f"SELECT * FROM read_parquet('{d}/kline_minute/**/*.parquet', union_by_name=true)"
-                            )
-                        except Exception:
-                            pass
-                    return written, day_count
-
-                progress("extend_minute", 10, f"获取分钟K [{start_str} ~ {end_str}]…")
-                written, day_count = await loop.run_in_executor(_long_task_executor, _run)
-
-                progress("extend_minute", 95, f"分钟K 完成,{day_count} 天")
-                job_store.succeed(job_id, {
-                    "minute_days": day_count,
-                    "universe_size": len(universe),
-                    "earliest_before": (earliest or latest).isoformat(),
-                    "earliest_after": new_start.isoformat(),
-                })
-                invalidate_storage_cache()
-            except Exception as e:
-                logger.exception("extend_minute_history failed: job_id=%s", job_id)
-                job_store.fail(job_id, str(e))
-                invalidate_storage_cache()
-            finally:
-                release_run_slot()
-
-        asyncio.create_task(task())
-        return {"status": "started", "job_id": job_id}
-    except HTTPException:
-        raise
-    except Exception as e:
-        logger.error("extend_minute_history error: %s\n%s", e, _tb.format_exc())
-        raise HTTPException(status_code=500, detail=str(e)) from e
-
-
-def _resolve_minute_universe(capset, repo) -> list[str]:
-    """分钟K标的池解析。"""
-    from app.tickflow.capabilities import Cap
-    if capset.has(Cap.KLINE_MINUTE_BATCH):
-        try:
-            from app.tickflow.pools import get_pool
-            all_a = get_pool("CN_Equity_A", refresh=True)
-            if all_a:
-                return sorted(all_a)
-        except Exception:
-            pass
-    return []
diff --git a/backend/app/jobs/daily_pipeline.py b/backend/app/jobs/daily_pipeline.py
index 21cc113..93b1dda 100644
--- a/backend/app/jobs/daily_pipeline.py
+++ b/backend/app/jobs/daily_pipeline.py
@@ -489,9 +489,10 @@ def run_now(
         emit("sync_minute", 90, f"获取分钟K [{minute_start} ~ {today}]…")
         logger.info("sync_minute: [%s ~ %s] start", minute_start, today)
         minute_symbols = _resolve_minute_symbols(capset)
-        def _minute_chunk_progress(cur: int, tot: int) -> None:
+        def _minute_chunk_progress(cur: int, tot: int, seg_label: str = "") -> None:
             emit("sync_minute", 90 + int(3 * cur / tot),
-                 f"分钟K 批次 {cur}/{tot}", stage_pct=int(100 * cur / tot), skip_log=True)
+                 f"分钟K 批次 {cur}/{tot}" + (f" [{seg_label}]" if seg_label else ""),
+                 stage_pct=int(100 * cur / tot), skip_log=True)
         written_minute = kline_sync.sync_and_persist_minute(
             minute_symbols, repo, capset, days=minute_days,
             on_chunk_done=_minute_chunk_progress,
diff --git a/backend/app/services/kline_sync.py b/backend/app/services/kline_sync.py
index 0501836..7bee346 100644
--- a/backend/app/services/kline_sync.py
+++ b/backend/app/services/kline_sync.py
@@ -506,13 +506,16 @@ def sync_minute_batch(
     count: int | None = None,
     batch_size: int | None = None,
     rpm: int | None = None,
-    on_chunk_done: Callable[[int, int], None] | None = None,
+    on_chunk_done: Callable[[int, int, str], None] | None = None,
 ) -> pl.DataFrame:
     """批量拉取多股分钟 K。
 
     优先使用 start_time / end_time 区间, 确保所有标的覆盖同一时间段。
     count 仅作为 fallback 保留。
     on_chunk_done(current, total) 每个 chunk 完成后回调。
+
+    TickFlow count 上限 10000 根/股, 1 天 240 根 → 单次最多约 41 天。
+    当区间超过 35 天时自动按月 (30 天) 分段拉取, 拼接结果。
     """
     # 自定义数据源分流: minute provider
     provider_name = preferences.get_minute_data_provider()
@@ -526,37 +529,63 @@ def sync_minute_batch(
         # 未配置 minute → 回退 TickFlow
 
     tf = get_client()
+
+    # TickFlow count 上限 10000 根/股, 1 天 240 根 → 单次最多约 41 个交易日。
+    # 按 41 交易日 (≈57 自然日) 分段: ≤41 交易日的区间只产生 1 段 (单次拉满)。
+    SEG_CHUNK = timedelta(days=57)  # 41 交易日 × 7/5 ≈ 57 自然日
+    time_segments: list[tuple[datetime, datetime]] = []
+    if start_time and end_time:
+        seg_start = start_time
+        while seg_start < end_time:
+            seg_end = min(seg_start + SEG_CHUNK, end_time)
+            time_segments.append((seg_start, seg_end))
+            seg_start = seg_end
+    else:
+        time_segments = [(None, None)]  # fallback: 用 count 模式
+
+    total_steps = len(time_segments) * len(chunked(symbols, batch_size))
+    step = 0
     out: list[pl.DataFrame] = []
-    chunks = chunked(symbols, batch_size)
 
-    for i, chunk in enumerate(chunks):
-        sleep_between_batches(i, rpm)
-        try:
-            if start_time and end_time:
-                raw = tf.klines.batch(
-                    chunk, period="1m",
-                    start_time=_datetime_to_ms(start_time),
-                    end_time=_datetime_to_ms(end_time),
-                    count=10000,
-                    as_dataframe=True, show_progress=False,
-                )
-            else:
-                raw = tf.klines.batch(chunk, period="1m", count=count or 1200,
-                                      as_dataframe=True, show_progress=False)
-        except Exception as e:  # noqa: BLE001
-            logger.warning("minute batch fetch failed for %d symbols: %s", len(chunk), e)
-            continue
+    for seg_idx, (seg_start, seg_end) in enumerate(time_segments):
+        # 当前的日期段描述 (供进度展示)
+        if seg_start and seg_end:
+            seg_label = f"{seg_start.strftime('%m-%d')}~{seg_end.strftime('%m-%d')}"
+        else:
+            seg_label = "最新"
+        seg_total = len(time_segments)
+        chunks = chunked(symbols, batch_size)
+        for i, chunk in enumerate(chunks):
+            sleep_between_batches(step, rpm)
+            step += 1
+            try:
+                if seg_start and seg_end:
+                    raw = tf.klines.batch(
+                        chunk, period="1m",
+                        start_time=_datetime_to_ms(seg_start),
+                        end_time=_datetime_to_ms(seg_end),
+                        count=10000,
+                        adjust="forward",
+                        as_dataframe=True, show_progress=False,
+                    )
+                else:
+                    raw = tf.klines.batch(chunk, period="1m", count=count or 1200,
+                                          adjust="forward",
+                                          as_dataframe=True, show_progress=False)
+            except Exception as e:  # noqa: BLE001
+                logger.warning("minute batch fetch failed for %d symbols: %s", len(chunk), e)
+                continue
 
-        if isinstance(raw, dict):
-            for sym, sub in raw.items():
-                if sub is None or len(sub) == 0:
-                    continue
-                out.append(_normalize_minute(sub, default_symbol=sym))
-        elif raw is not None and len(raw) > 0:
-            out.append(_normalize_minute(raw))
+            if isinstance(raw, dict):
+                for sym, sub in raw.items():
+                    if sub is None or len(sub) == 0:
+                        continue
+                    out.append(_normalize_minute(sub, default_symbol=sym))
+            elif raw is not None and len(raw) > 0:
+                out.append(_normalize_minute(raw))
 
-        if on_chunk_done:
-            on_chunk_done(i + 1, len(chunks))
+            if on_chunk_done:
+                on_chunk_done(step, total_steps, seg_label)
 
     if not out:
         return pl.DataFrame()
@@ -575,6 +604,7 @@ def fetch_minute_single(symbol: str, trade_date: date) -> pl.DataFrame:
             start_time=_datetime_to_ms(start_time),
             end_time=_datetime_to_ms(end_time),
             count=10000,
+            adjust="forward",
             as_dataframe=True, show_progress=False,
         )
     except Exception as e:
@@ -618,6 +648,20 @@ def _latest_minute_datetime(repo: KlineRepository) -> datetime | None:
     return None
 
 
+def _earliest_minute_datetime(repo: KlineRepository) -> datetime | None:
+    """本地分钟 K 数据的最早时间 (用于向前扩展的起点)。"""
+    try:
+        res = repo.execute_one("SELECT min(datetime) FROM kline_minute")
+        if res and res[0]:
+            d = res[0]
+            if isinstance(d, datetime):
+                return d
+            return datetime.fromisoformat(str(d))
+    except Exception:  # noqa: BLE001
+        pass
+    return None
+
+
 def _cleanup_null_datetime_minute(repo: KlineRepository) -> None:
     """检测并清除 datetime 全为 null 的旧版分钟 K 数据(迁移用)。"""
     minute_dir = repo.store.data_dir / "kline_minute"
@@ -703,9 +747,10 @@ def sync_and_persist_minute(
     repo: KlineRepository,
     capset: CapabilitySet,
     days: int = 5,
-    on_chunk_done: Callable[[int, int], None] | None = None,
+    on_chunk_done: Callable[[int, int, str], None] | None = None,
+    extend_backward: bool = False,
 ) -> int:
-    """同步分钟 K 并存到 Parquet(仅 raw,不前复权)。返回写入行数。
+    """同步分钟 K 并存到 Parquet(前复权价格, SDK 端 adjust=qfq)。返回写入行数。
 
     使用 start_time / end_time 区间拉取, 确保所有标的覆盖同一时间段。
     on_chunk_done(current, total) 每个 chunk 完成后回调。
@@ -729,13 +774,28 @@ def sync_and_persist_minute(
 
     now = datetime.now()
 
-    # 计算时间区间: 首次拉取回溯 N 天, 增量从最后数据时间开始
-    last_dt = _latest_minute_datetime(repo)
-    if last_dt:
-        start_time = last_dt
+    if extend_backward:
+        # 向前扩展模式: 从本地最早数据往前补, 叠加已有数据避免缺口。
+        earliest_dt = _earliest_minute_datetime(repo)
+        # 按交易日换算自然日 (7/5 系数)
+        # ≤41 交易日: 不加余量, 确保落在单段 (57 自然日) 内 → 单次拉满
+        # >41 交易日: +10 天余量覆盖节假日
+        calendar_days = int(days * 7 / 5) + (10 if days > 41 else 0)
+        if earliest_dt:
+            end_time = earliest_dt
+            start_time = end_time - timedelta(days=calendar_days)
+        else:
+            # 本地无数据 → 从今天往前拉
+            start_time = now - timedelta(days=calendar_days)
+            end_time = now
     else:
-        start_time = now - timedelta(days=days)
-    end_time = now
+        # 默认增量模式: 首次拉取回溯 N 天, 已有数据则从最新时间增量补到今天
+        last_dt = _latest_minute_datetime(repo)
+        if last_dt:
+            start_time = last_dt
+        else:
+            start_time = now - timedelta(days=days)
+        end_time = now
 
     limit = resolve_limit(
         capset,
diff --git a/backend/app/services/pipeline_jobs.py b/backend/app/services/pipeline_jobs.py
index aba9f9c..a7dc694 100644
--- a/backend/app/services/pipeline_jobs.py
+++ b/backend/app/services/pipeline_jobs.py
@@ -253,6 +253,12 @@ class JobStore:
             logger.warning("reap_stale: 强制取消卡死 job %s (已运行 %.0fs)",
                            jid, elapsed)
             self.fail(jid, f"超时自动取消 (运行 {int(elapsed)}s, 疑似卡死)")
+            # 强制释放重任务锁: 卡死的线程无法被中断, 锁永远不会自然释放。
+            # job 已标记 failed, 即使僵尸线程后续写入 parquet, 下次拉取会覆盖, 安全。
+            try:
+                _heavy_run_lock.release()
+            except RuntimeError:
+                pass
 
     def clear(self) -> None:
         """清空所有任务（内存 + 磁盘文件）。"""
diff --git a/frontend/src/components/StockIntradayChart.tsx b/frontend/src/components/StockIntradayChart.tsx
index e4fbb0a..411870f 100644
--- a/frontend/src/components/StockIntradayChart.tsx
+++ b/frontend/src/components/StockIntradayChart.tsx
@@ -32,11 +32,10 @@ export function StockIntradayChart({
   })
 
   const fetchMinute = useMutation({
-    mutationFn: () => api.extendMinuteHistory(5, 'day'),
+    mutationFn: () => api.syncMinuteSingle(symbol),
     onSuccess: () => {
       qc.invalidateQueries({ queryKey: ['kline-minute', symbol] })
-      qc.invalidateQueries({ queryKey: QK.dataStatus })
-      qc.invalidateQueries({ queryKey: QK.pipelineJobs })
+      qc.invalidateQueries({ queryKey: QK.klineMinute(symbol, date ?? '') })
       setMinuteDismissed(false)
     },
   })
@@ -61,7 +60,7 @@ export function StockIntradayChart({
           {fetchMinute.isPending ? (
             <div className="flex items-center justify-center h-full gap-2 text-xs text-accent">
               <Loader2 className="h-3.5 w-3.5 animate-spin" />
-              <span>正在获取最近5日分钟K…</span>
+              <span>正在获取分钟K数据…</span>
             </div>
           ) : sourceIsNone ? (
             // 数据源确认无此日分钟数据 (停牌/复牌延迟等): 静态提示 + 保留重试
diff --git a/frontend/src/components/data/MinuteSyncConfig.tsx b/frontend/src/components/data/MinuteSyncConfig.tsx
index 2a96b1e..31d50f6 100644
--- a/frontend/src/components/data/MinuteSyncConfig.tsx
+++ b/frontend/src/components/data/MinuteSyncConfig.tsx
@@ -1,11 +1,10 @@
 import { useState, useEffect } from 'react'
 import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
-import { Loader2 } from 'lucide-react'
+import { Loader2, Trash2, Download, Calendar } from 'lucide-react'
 import { api } from '@/lib/api'
 import { QK } from '@/lib/queryKeys'
-import { isExpertOrAbove } from '@/lib/capability-labels'
 
-export function MinuteSyncConfig({ caps, isRunning, onStart }: { caps: { label: string; capabilities: Record<string, { rpm: number | null; batch: number | null; subscribe: number | null }> } | undefined; isRunning: boolean; onStart: () => void }) {
+export function MinuteSyncConfig({ caps, onJobStart }: { caps: { label: string; capabilities: Record<string, { rpm: number | null; batch: number | null; subscribe: number | null }> } | undefined; onJobStart?: (jobId: string) => void }) {
   const qc = useQueryClient()
   const prefs = useQuery({
     queryKey: QK.preferences,
@@ -29,8 +28,40 @@ export function MinuteSyncConfig({ caps, isRunning, onStart }: { caps: { label:
     update.mutate({ enabled: !enabled, days: localDays })
   }
 
+  const setDays = (v: number) => {
+    const clamped = Math.max(1, Math.min(30, v))
+    setLocalDays(clamped)
+    update.mutate({ enabled, days: clamped })
+  }
+
+  // 清空分钟K数据 (二次确认)
+  const [confirmClear, setConfirmClear] = useState(false)
+  const clearMutation = useMutation({
+    mutationFn: () => api.clearMinute(),
+    onSuccess: () => {
+      setConfirmClear(false)
+      qc.invalidateQueries({ queryKey: QK.dataStatus })
+    },
+  })
+
+  // 手动获取 (两个独立按钮, 各自指定天数, 不影响自动同步偏好)
+  const [fetchingMode, setFetchingMode] = useState<'' | '40d' | '1y'>('')
+  const handleFetch = (mode: '40d' | '1y') => {
+    if (!hasMinuteCap) return
+    // 两个按钮都用向前扩展模式: 从本地最早数据往前补, 叠加避免缺口
+    const fetchDays = mode === '40d' ? 40 : 365
+    setFetchingMode(mode)
+    api.syncMinute(fetchDays, true).then((res) => {
+      qc.invalidateQueries({ queryKey: QK.pipelineJobs })
+      qc.invalidateQueries({ queryKey: QK.dataStatus })
+      // 通知主页面跟踪 job 进度 (ActiveJobCard 会显示实时进度+日志)
+      if (res.job_id && onJobStart) onJobStart(res.job_id)
+    }).finally(() => setFetchingMode(''))
+  }
+
   return (
     <div className="px-4 pb-4 pt-3 border-t border-accent/20 space-y-3">
+      {/* 第 1 行: 自动同步开关 + 天数 */}
       <div className="flex items-center justify-between">
         <div className="flex items-center gap-2.5">
           <button
@@ -47,173 +78,96 @@ export function MinuteSyncConfig({ caps, isRunning, onStart }: { caps: { label:
             />
           </button>
           <span className="text-xs text-foreground font-medium">
-            {enabled ? '自动同步' : '已关闭'}
+            {enabled ? '盘后自动同步' : '已关闭'}
           </span>
         </div>
-        {!hasMinuteCap && (
-          <span className="text-[10px] text-warning/80 bg-warning/8 rounded px-1.5 py-px font-medium">
-            需 Pro+
-          </span>
-        )}
-      </div>
-
-      <div className="flex items-center justify-between">
-        <span className="text-[10px] text-secondary">同步天数</span>
         <div className="flex items-center gap-2">
           <div className="flex items-center">
             <button
-              onClick={() => { const v = Math.max(1, localDays - 1); setLocalDays(v); update.mutate({ enabled, days: v }) }}
+              onClick={() => setDays(localDays - 1)}
               disabled={!hasMinuteCap || !enabled || localDays <= 1}
               className="h-6 w-6 flex items-center justify-center rounded-l-btn bg-elevated border border-border text-secondary hover:bg-border/50 disabled:opacity-30 transition-colors text-xs"
-            >
-              −
-            </button>
-            <div
-              className={`h-6 w-8 flex items-center justify-center border-y border-border text-[11px] font-mono tabular-nums ${
-                enabled ? 'text-foreground bg-base' : 'text-muted bg-elevated/50'
-              }`}
-            >
+            >−</button>
+            <div className={`h-6 w-8 flex items-center justify-center border-y border-border text-[11px] font-mono tabular-nums ${enabled ? 'text-foreground bg-base' : 'text-muted bg-elevated/50'}`}>
               {localDays}
             </div>
             <button
-              onClick={() => { const v = Math.min(15, localDays + 1); setLocalDays(v); update.mutate({ enabled, days: v }) }}
-              disabled={!hasMinuteCap || !enabled || localDays >= 15}
+              onClick={() => setDays(localDays + 1)}
+              disabled={!hasMinuteCap || !enabled || localDays >= 30}
               className="h-6 w-6 flex items-center justify-center rounded-r-btn bg-elevated border border-border text-secondary hover:bg-border/50 disabled:opacity-30 transition-colors text-xs"
-            >
-              +
-            </button>
+            >+</button>
           </div>
           <span className="text-[10px] text-muted">天</span>
+          {!hasMinuteCap && (
+            <span className="text-[10px] text-warning/80 bg-warning/8 rounded px-1.5 py-px font-medium">需 Pro+</span>
+          )}
         </div>
       </div>
 
-      <div className="pt-2 border-t border-border space-y-2.5">
-        <div className="text-[10px] text-secondary">向前扩展历史数据</div>
-        <MinuteExtendControls hasMinuteCap={hasMinuteCap} tierLabel={caps?.label ?? ''} isRunning={isRunning} onStart={onStart} />
-      </div>
-
-      <div className="text-[10px] text-muted">
-        A股标的 · 原始数据存储(查询时实时复权)
-      </div>
-    </div>
-  )
-}
-
-function MinuteExtendControls({ hasMinuteCap, tierLabel, isRunning, onStart }: { hasMinuteCap: boolean; tierLabel: string; isRunning: boolean; onStart: () => void }) {
-  const qc = useQueryClient()
-  // 月单位(按月扩展更长的分钟K历史)仅 Expert+ 开放;Pro 仅可用"天"(1~15 天)
-  const canUseMonth = isExpertOrAbove(tierLabel)
-  const [unit, setUnit] = useState<'day' | 'month'>('day')
-  const [value, setValue] = useState(5)
-  const [confirmOpen, setConfirmOpen] = useState(false)
-
-  const dataStatus = useQuery({
-    queryKey: QK.dataStatus,
-    queryFn: api.dataStatus,
-  })
-  // 判断本地是否已有分钟K数据:后端 _safe_aggregate_minute 为避免全表扫描,
-  // rows 恒为 0,改用 trading_days(分区目录数,真实统计)判断。
-  const hasMinuteData = !!(dataStatus.data?.minute?.trading_days)
-
-  const extend = useMutation({
-    mutationFn: () => api.extendMinuteHistory(value, unit),
-    onSuccess: () => {
-      onStart()
-      qc.invalidateQueries({ queryKey: QK.pipelineJobs })
-      qc.invalidateQueries({ queryKey: QK.dataStatus })
-    },
-  })
-
-  // 各单位上限:day 15 天,month 6 月(180 天)
-  const maxValue = unit === 'month' ? 6 : 15
-
-  const handleFetch = () => {
-    if (!hasMinuteData) {
-      setConfirmOpen(true)
-    } else {
-      extend.mutate()
-    }
-  }
-
-  // 切换单位时把 value clamp 到新单位的上限
-  const switchUnit = (u: 'day' | 'month') => {
-    if (u === unit) return
-    setUnit(u)
-    const max = u === 'month' ? 6 : 15
-    setValue(v => Math.min(v, max))
-  }
-
-  return (
-    <>
-      <div className="flex items-center gap-2">
-        <div className="flex items-center">
-          <button
-            onClick={() => setValue(Math.max(1, value - 1))}
-            disabled={!hasMinuteCap || isRunning || extend.isPending}
-            className="h-6 w-6 flex items-center justify-center rounded-l-btn bg-elevated border border-border text-secondary hover:bg-border/50 disabled:opacity-30 transition-colors text-xs"
-          >−</button>
-          <div className="h-6 w-8 flex items-center justify-center border-y border-border text-[11px] font-mono tabular-nums text-foreground bg-base">
-            {value}
-          </div>
-          <button
-            onClick={() => setValue(Math.min(maxValue, value + 1))}
-            disabled={!hasMinuteCap || isRunning || extend.isPending || value >= maxValue}
-            className="h-6 w-6 flex items-center justify-center rounded-r-btn bg-elevated border border-border text-secondary hover:bg-border/50 disabled:opacity-30 transition-colors text-xs"
-          >+</button>
-        </div>
-
-        {canUseMonth ? (
-          <div className="flex rounded-btn border border-border overflow-hidden">
-            {(['day', 'month'] as const).map(u => (
-              <button
-                key={u}
-                onClick={() => switchUnit(u)}
-                className={`px-2 py-0.5 text-[10px] font-medium transition-colors ${
-                  unit === u ? 'bg-accent/15 text-accent' : 'text-secondary hover:bg-elevated'
-                }`}
-              >{u === 'day' ? '天' : '月'}</button>
-            ))}
-          </div>
-        ) : (
-          <span className="text-[10px] text-muted">天</span>
-        )}
+      {/* 第 2 行: 两个手动获取按钮 (40天快速 / 1年分段) */}
+      <div className="pt-2 border-t border-border grid grid-cols-2 gap-2">
+        <button
+          onClick={() => handleFetch('40d')}
+          disabled={!hasMinuteCap || fetchingMode !== ''}
+          className="inline-flex flex-col items-center justify-center gap-0.5 px-2 py-2 rounded-btn bg-accent/90 text-foreground text-xs font-medium hover:bg-accent disabled:opacity-40 transition-colors duration-150"
+        >
+          {fetchingMode === '40d' ? (
+            <><Loader2 className="h-3.5 w-3.5 animate-spin" /><span>获取中…</span></>
+          ) : (
+            <><Download className="h-3.5 w-3.5" /><span>往前获取 (单次拉满)</span></>
+          )}
+        </button>
+        <button
+          onClick={() => handleFetch('1y')}
+          disabled={!hasMinuteCap || fetchingMode !== ''}
+          className="inline-flex flex-col items-center justify-center gap-0.5 px-2 py-2 rounded-btn border border-amber-400/40 bg-amber-400/10 text-amber-400 text-xs font-medium hover:bg-amber-400/20 disabled:opacity-40 transition-colors duration-150"
+        >
+          {fetchingMode === '1y' ? (
+            <><Loader2 className="h-3.5 w-3.5 animate-spin" /><span>分段获取中…</span></>
+          ) : (
+            <><Calendar className="h-3.5 w-3.5" /><span>获取最近 1 年</span><span className="text-[9px] opacity-70">分段拉取</span></>
+          )}
+        </button>
       </div>
 
+      {/* 第 3 行: 清空 */}
       <button
-        onClick={handleFetch}
-        disabled={!hasMinuteCap || isRunning || extend.isPending}
-        className="w-full inline-flex items-center justify-center gap-1.5 px-3 py-1.5 rounded-btn bg-accent/90 text-base text-xs font-medium hover:bg-accent disabled:opacity-40 disabled:pointer-events-none transition-colors duration-150"
+        onClick={() => setConfirmClear(true)}
+        disabled={clearMutation.isPending}
+        title="清空分钟K数据"
+        className="w-full inline-flex items-center justify-center gap-1.5 px-3 py-1.5 rounded-btn border border-danger/30 text-danger/80 text-xs font-medium hover:bg-danger/10 disabled:opacity-40 transition-colors duration-150"
       >
-        {extend.isPending ? (
-          <><Loader2 className="h-3 w-3 animate-spin" />请求中…</>
-        ) : (
-          <>获取数据</>
-        )}
+        <Trash2 className="h-3 w-3" />
+        清空分钟K数据
       </button>
 
-      {confirmOpen && (
+      {/* 说明 */}
+      <div className="text-[10px] text-muted leading-relaxed">
+        A股标的 · 前复权价格 · 均从本地最早数据向前叠加 ·{' '}
+        <span className="text-accent">单次拉满</span>约 40 个交易日,{' '}
+        <span className="text-amber-400">1 年</span>按月分段 (速度较慢)
+      </div>
+
+      {/* 清空确认弹窗 */}
+      {confirmClear && (
         <div className="fixed inset-0 z-50 flex items-center justify-center">
-          <div className="absolute inset-0 bg-black/60 backdrop-blur-sm" onClick={() => setConfirmOpen(false)} />
+          <div className="absolute inset-0 bg-black/60 backdrop-blur-sm" onClick={() => !clearMutation.isPending && setConfirmClear(false)} />
           <div className="relative rounded-card border border-border bg-surface shadow-2xl mx-4 px-6 py-5 max-w-sm w-full space-y-4">
-            <div className="text-sm text-foreground text-center">本地暂无分钟K数据，是否立即获取最近 {value} {unit === 'month' ? '月' : '天'}的分钟K？</div>
+            <div className="text-sm text-foreground text-center font-medium">确认清空分钟K数据？</div>
+            <div className="text-[11px] text-muted text-center leading-relaxed">
+              此操作仅删除分钟K (kline_minute) 数据, <span className="text-foreground/80">不影响</span>日K、复权因子、指标等其他数据。清空后可重新获取。
+            </div>
             <div className="flex items-center justify-center gap-3">
-              <button
-                onClick={() => { setConfirmOpen(false); extend.mutate() }}
-                disabled={extend.isPending}
-                className="px-4 py-1.5 rounded-btn bg-accent/90 text-base text-xs font-medium hover:bg-accent disabled:opacity-40 transition-colors duration-150"
-              >
-                确定
-              </button>
-              <button
-                onClick={() => setConfirmOpen(false)}
-                className="px-4 py-1.5 rounded-btn bg-elevated text-secondary text-xs hover:bg-elevated/80 transition-colors duration-150"
-              >
-                取消
+              <button onClick={() => setConfirmClear(false)} disabled={clearMutation.isPending}
+                className="px-4 py-1.5 rounded-btn bg-elevated text-secondary text-xs hover:bg-elevated/80 transition-colors duration-150">取消</button>
+              <button onClick={() => clearMutation.mutate()} disabled={clearMutation.isPending}
+                className="px-4 py-1.5 rounded-btn bg-danger/90 text-foreground text-xs font-medium hover:bg-danger disabled:opacity-40 transition-colors duration-150">
+                {clearMutation.isPending ? <span className="inline-flex items-center gap-1.5"><Loader2 className="h-3 w-3 animate-spin" />清空中…</span> : '确认清空'}
               </button>
             </div>
           </div>
         </div>
       )}
-    </>
+    </div>
   )
 }
diff --git a/frontend/src/lib/api.ts b/frontend/src/lib/api.ts
index e3b98c1..7065dc7 100644
--- a/frontend/src/lib/api.ts
+++ b/frontend/src/lib/api.ts
@@ -1236,8 +1236,21 @@ export const api = {
       `/api/kline/sync?symbol=${encodeURIComponent(symbol)}&days=${days}`,
       { method: 'POST' },
     ),
-  syncMinute: () =>
-    request<{ status: string; job_id: string }>('/api/kline/sync_minute', { method: 'POST' }),
+  syncMinute: (days?: number, extend?: boolean) =>
+    request<{ status: string; job_id: string }>('/api/kline/sync_minute', {
+      method: 'POST',
+      body: JSON.stringify({ ...(days ? { days } : {}), ...(extend ? { extend: true } : {}) }),
+    }),
+  syncMinuteSingle: (symbol: string) =>
+    request<{ status: string; symbol: string; rows: number }>('/api/kline/sync_minute_single', {
+      method: 'POST',
+      body: JSON.stringify({ symbol }),
+    }),
+  clearMinute: () =>
+    request<{ status: string; removed: number }>('/api/kline/clear_minute', {
+      method: 'POST',
+      body: JSON.stringify({ confirm: true }),
+    }),
   extendHistory: (value: number, unit: 'day' | 'month' | 'year') =>
     request<{ status: string; job_id: string }>('/api/kline/extend_history', {
       method: 'POST',
@@ -1248,11 +1261,6 @@ export const api = {
       method: 'POST',
       body: JSON.stringify({ start_date: startDate }),
     }),
-  extendMinuteHistory: (value: number, unit: 'day' | 'month') =>
-    request<{ status: string; job_id: string }>('/api/kline/extend_minute_history', {
-      method: 'POST',
-      body: JSON.stringify({ value, unit }),
-    }),
   rebuildEnriched: () =>
     request<{ status: string; job_id: string }>('/api/kline/rebuild_enriched', {
       method: 'POST',
diff --git a/frontend/src/pages/Data.tsx b/frontend/src/pages/Data.tsx
index 1f205c5..3e4c980 100644
--- a/frontend/src/pages/Data.tsx
+++ b/frontend/src/pages/Data.tsx
@@ -1085,7 +1085,7 @@ export function Data() {
       <AnimatePresence>
         {openSettings === 'minute' && (
           <SettingsModal title="分钟 K · 同步设置" onClose={() => setOpenSettings(null)}>
-            <MinuteSyncConfig caps={caps.data} isRunning={!!activeJobId} onStart={() => setOpenSettings(null)} />
+            <MinuteSyncConfig caps={caps.data} onJobStart={(jobId) => { setActiveJobId(jobId); setOpenSettings(null) }} />
           </SettingsModal>
         )}
       </AnimatePresence>