diff --git a/apps/web/src/pages/generate/hooks/useStep2Materials.ts b/apps/web/src/pages/generate/hooks/useStep2Materials.ts
index 24fcd22fa..06f41797b 100755
--- a/apps/web/src/pages/generate/hooks/useStep2Materials.ts
+++ b/apps/web/src/pages/generate/hooks/useStep2Materials.ts
@@ -36,19 +36,20 @@ export function useStep2Materials({
 
   /* ── 自动触发智能匹配：选择视频库后自动调用 ── */
   const autoTriggeredRef = useRef<string>("")
+  const { handleSmartMatch } = smartMatch
   useEffect(() => {
     // 仅在 auto 模式 + 素材加载完成后自动触发
     if (materialMode !== "auto") return
     if (!selectedLibraryId) return
     if (materialsLoading) return
     if (materials.items.length === 0) return
-    // 防止同一视频库重复触发
-    if (autoTriggeredRef.current === selectedLibraryId) return
+    // 防止同一视频库+同一模式重复触发（模式切换时 key 变化会重新触发）
+    const triggerKey = `${selectedLibraryId}_${materialMode}`
+    if (autoTriggeredRef.current === triggerKey) return
 
-    autoTriggeredRef.current = selectedLibraryId
-    smartMatch.handleSmartMatch()
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [selectedLibraryId, materialMode, materialsLoading, materials.items.length])
+    autoTriggeredRef.current = triggerKey
+    handleSmartMatch()
+  }, [selectedLibraryId, materialMode, materialsLoading, materials.items, handleSmartMatch])
 
   /* ── 手动选择素材 ── */
   const handleToggleMaterial = useCallback(