diff --git a/web/src/components/Chat/MessageBubble.tsx b/web/src/components/Chat/MessageBubble.tsx
index 374fc69..b28b918 100644
--- a/web/src/components/Chat/MessageBubble.tsx
+++ b/web/src/components/Chat/MessageBubble.tsx
@@ -589,6 +589,11 @@ export function MessageBubble({ message, onNavigateToSubAgent, showThinking = tr
     )
   }
 
+  // 隐藏思考且无实质内容时，不渲染空的助手消息气泡
+  if (!isUser && !isTool && !isMergedTool && !showThinking && !message.content.trim() && message.reasoningContent) {
+    return null
+  }
+
   const getIcon = () => {
     if (isUser) return <User className="h-4 w-4" />
     if (isTool) {