diff --git a/web/src/components/TraderConfigModal.tsx b/web/src/components/TraderConfigModal.tsx
index 183f8fbb..9adcec58 100644
--- a/web/src/components/TraderConfigModal.tsx
+++ b/web/src/components/TraderConfigModal.tsx
@@ -153,12 +153,6 @@ export function TraderConfigModal({
     fetchPromptTemplates()
   }, [])
 
-  // 当选择的币种改变时，更新输入框
-  useEffect(() => {
-    const symbolsString = selectedCoins.join(',')
-    setFormData((prev) => ({ ...prev, trading_symbols: symbolsString }))
-  }, [selectedCoins])
-
   if (!isOpen) return null
 
   const handleInputChange = (field: keyof TraderConfigData, value: any) => {
@@ -176,11 +170,15 @@ export function TraderConfigModal({
 
   const handleCoinToggle = (coin: string) => {
     setSelectedCoins((prev) => {
-      if (prev.includes(coin)) {
-        return prev.filter((c) => c !== coin)
-      } else {
-        return [...prev, coin]
-      }
+      const newCoins = prev.includes(coin)
+        ? prev.filter((c) => c !== coin)
+        : [...prev, coin]
+
+      // 同时更新 formData.trading_symbols
+      const symbolsString = newCoins.join(',')
+      setFormData((current) => ({ ...current, trading_symbols: symbolsString }))
+
+      return newCoins
     })
   }