diff --git a/dev.ps1 b/dev.ps1
index 730c95e..a89464f 100644
--- a/dev.ps1
+++ b/dev.ps1
@@ -171,6 +171,11 @@ $frontendPidFile = [System.IO.Path]::GetTempFileName()
 
 $backendJob = Start-Job -Name 'backend' -ScriptBlock {
     param($pidFile, $dir, $port)
+    # Start-Job 开的是全新 powershell.exe 子进程, 不继承主进程的 UTF-8 设置,
+    # 默认用系统 ANSI (中文 Windows = GBK/cp936) 解码后端 UTF-8 输出 → 中文乱码。
+    # 这里强制子进程用 UTF-8, 与 app/__init__.py 的 stdout/stderr 编码对齐。
+    [Console]::OutputEncoding = New-Object System.Text.UTF8Encoding $false
+    $OutputEncoding           = New-Object System.Text.UTF8Encoding $false
     $PID | Out-File -FilePath $pidFile -Encoding ascii -Force
     $env:PYTHONUNBUFFERED = '1'
     Set-Location $dir
@@ -179,6 +184,9 @@ $backendJob = Start-Job -Name 'backend' -ScriptBlock {
 
 $frontendJob = Start-Job -Name 'frontend' -ScriptBlock {
     param($pidFile, $dir, $port)
+    # 同上: job 子进程默认 GBK, pnpm/前端工具链也是 UTF-8 输出, 需对齐。
+    [Console]::OutputEncoding = New-Object System.Text.UTF8Encoding $false
+    $OutputEncoding           = New-Object System.Text.UTF8Encoding $false
     $PID | Out-File -FilePath $pidFile -Encoding ascii -Force
     Set-Location $dir
     & pnpm dev --host 0.0.0.0 --port $port 2>&1