diff --git a/components/canvas/CanvasChatPanel.tsx b/components/canvas/CanvasChatPanel.tsx
index d3f3e81a4..fe8ae060b 100644
--- a/components/canvas/CanvasChatPanel.tsx
+++ b/components/canvas/CanvasChatPanel.tsx
@@ -105,6 +105,7 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
   const addNode = useCanvasStore((state) => state.addNode);
   const nodes = useCanvasStore((state) => state.nodes);
   const selectedNodeIds = useCanvasStore((state) => state.selectedNodeIds);
+  const clearSelection = useCanvasStore((state) => state.clearSelection);
   
   // 获取纯 UUID（去掉 canvas- 前缀）用于 API 调用
   const rawChatId = chatId.startsWith('canvas-') 
@@ -533,12 +534,16 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
     setInput("");
     setAttachments([]);
     
+    // 🆕 清空画布选中状态（防止 useEffect 重新添加标签）
+    clearSelection();
+    
     // 🆕 清空 contenteditable div 的内容
     const editableDiv = textareaRef.current as HTMLDivElement | null;
-    if (editableDiv && editableDiv.isContentEditable) {
+    if (editableDiv) {
       editableDiv.innerHTML = '';
+      console.log('[CanvasChat] 已清空输入框和选中状态');
     }
-  }, [input, attachments, selectedModelId, sendMessage, getRecentImageUrls]);
+  }, [input, attachments, selectedModelId, sendMessage, getRecentImageUrls, clearSelection]);
 
   // 处理文件选择 - 上传后立即添加到画布
   const handleFileSelect = async (e: React.ChangeEvent<HTMLInputElement>) => {