diff --git a/backend/app/services/quote_service.py b/backend/app/services/quote_service.py
index 688f153..0e80c87 100644
--- a/backend/app/services/quote_service.py
+++ b/backend/app/services/quote_service.py
@@ -818,7 +818,12 @@ class QuoteService:
         ] if c in df.columns]
         if not keep or "symbol" not in keep:
             return pl.DataFrame()
-        return df.select(keep)
+        out = df.select(keep)
+        # 实时 API 的 turnover_rate 入口契约为小数制(0.05 = 5%).
+        # enriched 内部统一存百分数值(5 = 5%), 后续页面/筛选直接展示和比较。
+        if "turnover_rate" in out.columns:
+            out = out.with_columns((pl.col("turnover_rate").cast(pl.Float64, strict=False) * 100).alias("turnover_rate"))
+        return out
 
     @staticmethod
     def _build_index_quotes(records: list[dict]) -> pl.DataFrame:
diff --git a/backend/app/strategy/builtin/high_turnover_surge.py b/backend/app/strategy/builtin/high_turnover_surge.py
index 807de60..710d396 100644
--- a/backend/app/strategy/builtin/high_turnover_surge.py
+++ b/backend/app/strategy/builtin/high_turnover_surge.py
@@ -30,7 +30,7 @@ ALERTS = []
 
 
 def filter(df: pl.DataFrame, params: dict) -> pl.Expr:
-    min_to = params.get("min_turnover", 5.0) / 100.0
+    min_to = params.get("min_turnover", 5.0)
     min_chg = params.get("min_change", 3.0) / 100.0
     expr = pl.col("symbol").is_not_null() | pl.col("symbol").is_null()
     if params.get("use_turnover_filter", True):
diff --git a/backend/tests/test_high_turnover_strategy.py b/backend/tests/test_high_turnover_strategy.py
new file mode 100644
index 0000000..c330cfb
--- /dev/null
+++ b/backend/tests/test_high_turnover_strategy.py
@@ -0,0 +1,18 @@
+from __future__ import annotations
+
+import polars as pl
+
+from app.strategy.builtin import high_turnover_surge
+
+
+def test_high_turnover_surge_uses_percent_value_turnover_rate():
+    df = pl.DataFrame({
+        "symbol": ["low", "hit"],
+        "turnover_rate": [4.9, 5.1],
+        "change_pct": [0.04, 0.04],
+    })
+
+    expr = high_turnover_surge.filter(df, {"min_turnover": 5.0, "min_change": 3.0})
+    out = df.filter(expr)
+
+    assert out["symbol"].to_list() == ["hit"]
diff --git a/backend/tests/test_realtime_turnover_rate.py b/backend/tests/test_realtime_turnover_rate.py
new file mode 100644
index 0000000..c4ad75a
--- /dev/null
+++ b/backend/tests/test_realtime_turnover_rate.py
@@ -0,0 +1,49 @@
+from __future__ import annotations
+
+import polars as pl
+import pytest
+
+from app.indicators import pipeline
+from app.services.quote_service import QuoteService
+
+
+def _today_rows(turnover_rate: float | None = None) -> pl.DataFrame:
+    row = {
+        "symbol": "600000.SH",
+        "open": 10.0,
+        "high": 10.0,
+        "low": 10.0,
+        "close": 10.0,
+        "raw_close": 10.0,
+        "raw_high": 10.0,
+        "volume": 8000.0,
+    }
+    if turnover_rate is not None:
+        row["turnover_rate"] = turnover_rate
+    return pl.DataFrame([row])
+
+
+def _instruments() -> pl.DataFrame:
+    return pl.DataFrame({
+        "symbol": ["600000.SH"],
+        "name": ["Test"],
+        "float_shares": [100_000_000.0],
+    })
+
+
+def test_quote_extra_normalizes_realtime_turnover_fraction_to_percent_value():
+    out = QuoteService._build_quote_extra([{"symbol": "600000.SH", "turnover_rate": 0.008}])
+
+    assert out["turnover_rate"][0] == pytest.approx(0.8)
+
+
+def test_realtime_turnover_rate_uses_api_value_directly_after_entry_normalization():
+    out = pipeline._compute_limit_signals_today(_today_rows(0.8), _instruments())
+
+    assert out["turnover_rate"][0] == pytest.approx(0.8)
+
+
+def test_realtime_turnover_rate_falls_back_to_float_shares_when_missing():
+    out = pipeline._compute_limit_signals_today(_today_rows(), _instruments())
+
+    assert out["turnover_rate"][0] == pytest.approx(0.8)
diff --git a/docs/custom-data-source.md b/docs/custom-data-source.md
index 1d9692a..d91a52a 100644
--- a/docs/custom-data-source.md
+++ b/docs/custom-data-source.md
@@ -253,7 +253,7 @@ cp docs/examples/custom-data-source/mock_source.yaml data/data_sources/mock_sour
   change_pct = 涨跌幅 (小数, 0.0366 = 3.66%)
   change_amount = 涨跌额
   amplitude = 振幅
-  turnover_rate = 换手率
+  turnover_rate = 换手率 (小数, 0.05 = 5%; 若上游返回 5 表示 5%, 配置 transforms: turnover_rate: "value / 100")
 
 分钟K (minute):
   symbol = 股票代码
diff --git a/frontend/src/pages/Dashboard.tsx b/frontend/src/pages/Dashboard.tsx
index be56704..8141be7 100644
--- a/frontend/src/pages/Dashboard.tsx
+++ b/frontend/src/pages/Dashboard.tsx
@@ -415,8 +415,7 @@ function StockList({ title, rows, mode, onStockClick }: {
                 </>
               ) : mode === 'active' ? (
                 <>
-                  {/* overview 的 turnover_rate 为小数制, 需 ×100 转百分数显示 */}
-                  <div className="font-mono text-[11px] text-accent">{fmtPrice(r.turnover_rate != null ? r.turnover_rate * 100 : null, 1)}%</div>
+                  <div className="font-mono text-[11px] text-accent">{fmtPrice(r.turnover_rate, 1)}%</div>
                   <div className={`font-mono text-[9px] ${pctClass(r.change_pct)}`}>{fmtStockPct(r.change_pct)}</div>
                 </>
               ) : (
diff --git a/frontend/src/pages/settings/DataSourceEditor.tsx b/frontend/src/pages/settings/DataSourceEditor.tsx
index 474b17a..3c24d0e 100644
--- a/frontend/src/pages/settings/DataSourceEditor.tsx
+++ b/frontend/src/pages/settings/DataSourceEditor.tsx
@@ -45,7 +45,7 @@ const FIELD_LABELS: Record<string, string> = {
   change_pct: '涨跌幅 (小数 0.0366=3.66%)',
   change_amount: '涨跌额',
   amplitude: '振幅 (小数)',
-  turnover_rate: '换手率 (小数)',
+  turnover_rate: '换手率 (小数 0.05=5%)',
   timestamp: '时间戳',
   session: '交易时段',
 }