diff --git a/frontend/src/views/backtest/Optimize.vue b/frontend/src/views/backtest/Optimize.vue
index 9a7cb71..b77c94e 100644
--- a/frontend/src/views/backtest/Optimize.vue
+++ b/frontend/src/views/backtest/Optimize.vue
@@ -1,8 +1,8 @@
 <script setup lang="ts">
-import { ref, reactive, onMounted } from 'vue'
+import { ref, reactive, onMounted, watch } from 'vue'
 import { useRouter } from 'vue-router'
 import { ElMessage } from 'element-plus'
-import { getStrategies, type StrategyItem } from '@/api/strategy'
+import { getStrategies, getParams, type StrategyItem } from '@/api/strategy'
 import { submitOptimize } from '@/api/backtest'
 
 const router = useRouter()
@@ -42,6 +42,37 @@ function parseGrid(): Record<string, [number, number, number]> | null {
   return grid
 }
 
+/**
+ * 策略切换时按其自身参数自动填充网格，避免 grid 参数与策略不匹配。
+ * 否则如 DualThrust/AtrRsi 用了 DoubleMa 的 fast/slow_window（硬编码默认），
+ * 参数对该策略无效 → 所有组合跑出完全相同结果（历史 opt_235fa738 等 24 组合全相同）。
+ * 范围以参数默认值为中心，用户按需调整。
+ */
+async function loadGridForStrategy(name: string): Promise<void> {
+  if (!name) return
+  try {
+    const p = await getParams(name)
+    const lines: string[] = []
+    for (const pname of p.parameters) {
+      if (pname === 'vt_symbol') continue
+      const def = Number(p.defaults?.[pname])
+      if (!Number.isFinite(def)) continue
+      const step = Math.max(1, Math.round(Math.abs(def) / 10) || 1)
+      const start = Math.max(0, def - step)
+      const end = def + step
+      lines.push(`${pname},${start},${end},${step}`)
+    }
+    if (lines.length) {
+      form.gridText = lines.join('\n')
+      ElMessage.info(`已按 ${name} 参数填充网格，请按需调整范围`)
+    }
+  } catch {
+    // 拉取参数失败时保持用户当前网格
+  }
+}
+
+watch(() => form.strategy, (n) => { if (n) loadGridForStrategy(n) })
+
 async function onSubmit(): Promise<void> {
   const grid = parseGrid()
   if (!grid) return