diff --git a/frontend/src/views/backtest/PortfolioBacktest.vue b/frontend/src/views/backtest/PortfolioBacktest.vue
index 71bb8bd..441f040 100644
--- a/frontend/src/views/backtest/PortfolioBacktest.vue
+++ b/frontend/src/views/backtest/PortfolioBacktest.vue
@@ -57,7 +57,7 @@ const selectedInstanceId = ref<number | null>(null)
 const form = reactive({
   pool: 'all',
   strategy: 'all_weather',
-  max_pool: 30,
+  max_pool: 0,
   start: dr.start,
   end: dr.end,
   cash: 1_000_000,
@@ -516,7 +516,7 @@ function fmtNum(v: number | null | undefined, digits = 2): string {
           </el-form-item>
           <el-form-item label="选股池上限">
             <el-input-number v-model="form.max_pool" :min="0" :step="10" :controls="false" style="width: 220px" />
-            <span class="muted form-hint">0=全市场不限, N=前N只(MVP验证用, 默认30)</span>
+            <span class="muted form-hint">0=全市场不限(默认), N=前N只</span>
           </el-form-item>
           <el-form-item label="K 线周期">
             <el-select v-model="form.interval" style="width: 220px">
diff --git a/sanguo_api/routes_portfolio.py b/sanguo_api/routes_portfolio.py
index 3c43a1a..d9e22dc 100644
--- a/sanguo_api/routes_portfolio.py
+++ b/sanguo_api/routes_portfolio.py
@@ -38,7 +38,7 @@ class PortfolioBacktestRequest(BaseModel):
         default="all_weather",
         description="策略: all_weather/momentum_timing/value_selection/small_cap",
     )
-    max_pool: int = Field(default=30, description="选股池上限: 0=全市场不限, N=前N只(MVP验证用)")
+    max_pool: int = Field(default=0, description="选股池上限: 0=全市场不限(默认), N=前N只")
     # A 股费用(对齐个股回测)
     commission_rate: float = Field(default=0.0003, description="佣金率双边(万3=0.0003)")
     stamp_duty_rate: float = Field(default=0.001, description="印花税率卖出(千1=0.001)")