diff --git a/apps/web/src/pages/generate/hooks/useStep2Materials.ts b/apps/web/src/pages/generate/hooks/useStep2Materials.ts
index 06f41797b..0d5a8c406 100755
--- a/apps/web/src/pages/generate/hooks/useStep2Materials.ts
+++ b/apps/web/src/pages/generate/hooks/useStep2Materials.ts
@@ -38,16 +38,18 @@ export function useStep2Materials({
   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
+    // 离开 auto 模式时重置，确保下次进入 auto 模式能重新触发
+    if (materialMode !== "auto") {
+      autoTriggeredRef.current = ""
+      return
+    }
     if (!selectedLibraryId) return
     if (materialsLoading) return
     if (materials.items.length === 0) 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
+    // 防止同一视频库重复触发
+    if (autoTriggeredRef.current === selectedLibraryId) return
 
-    autoTriggeredRef.current = triggerKey
+    autoTriggeredRef.current = selectedLibraryId
     handleSmartMatch()
   }, [selectedLibraryId, materialMode, materialsLoading, materials.items, handleSmartMatch])