diff --git a/components/pages/work-flow/media-viewer.tsx b/components/pages/work-flow/media-viewer.tsx
index b6aa3f0..6258318 100644
--- a/components/pages/work-flow/media-viewer.tsx
+++ b/components/pages/work-flow/media-viewer.tsx
@@ -521,6 +521,7 @@ export const MediaViewer = React.memo(function MediaViewer({
 
   // 渲染分镜草图
   const renderSketchContent = (currentSketch: any) => {
+    if (!currentSketch) return null;
 
     return (
       <div