diff --git a/components/canvas/CanvasChatPanel.tsx b/components/canvas/CanvasChatPanel.tsx
index 8d62c874b..f974dc3e4 100644
--- a/components/canvas/CanvasChatPanel.tsx
+++ b/components/canvas/CanvasChatPanel.tsx
@@ -256,14 +256,20 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
     messagesEndRef.current?.scrollIntoView({ behavior: "smooth" });
   }, [messages]);
 
+  // 标记是否已经为当前画布设置过标题（避免重复调用）
+  const hasSetCanvasTitle = useRef(false);
+
   // 处理发送
-  const handleSend = useCallback(() => {
+  const handleSend = useCallback(async () => {
     if (!input.trim() && attachments.length === 0) return;
     if (!selectedModelId) {
       toast.error("请选择一个模型");
       return;
     }
     
+    // 获取第一张图片的 URL（用于自动命名和缩略图）
+    const firstImageAttachment = attachments.find(a => a.contentType?.startsWith('image/'));
+    
     // 构建 parts 数组：文件在前，文本在后（与 multimodal-input 一致）
     const parts: any[] = [];
     
@@ -313,9 +319,50 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
       toast.success(`已将 ${attachments.length} 张图片添加到画布`);
     }
     
+    // 如果是第一次上传图片，自动识别并设置画布标题和缩略图
+    if (firstImageAttachment && !hasSetCanvasTitle.current) {
+      hasSetCanvasTitle.current = true;
+      
+      // 异步调用 AI 识别图片主体并更新画布
+      (async () => {
+        try {
+          // 调用 auto-title API 识别图片主体
+          const response = await fetch('/api/canvas/auto-title', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ imageUrl: firstImageAttachment.url }),
+          });
+          
+          if (response.ok) {
+            const data = await response.json();
+            const title = data.title || '未命名画布';
+            
+            // 提取纯 UUID（去掉 canvas- 前缀）
+            const rawId = chatId.startsWith('canvas-') 
+              ? chatId.replace('canvas-', '') 
+              : chatId;
+            
+            // 更新画布标题和缩略图
+            await fetch(`/api/canvas/${rawId}`, {
+              method: 'PUT',
+              headers: { 'Content-Type': 'application/json' },
+              body: JSON.stringify({
+                title: title,
+                thumbnail: firstImageAttachment.url,
+              }),
+            });
+            
+            console.log('[CanvasChat] 画布已自动命名为:', title);
+          }
+        } catch (error) {
+          console.error('[CanvasChat] 自动命名失败:', error);
+        }
+      })();
+    }
+    
     setInput("");
     setAttachments([]);
-  }, [input, attachments, selectedModelId, sendMessage, addNode, nodes.length]);
+  }, [input, attachments, selectedModelId, sendMessage, addNode, nodes.length, chatId]);
 
   // 处理文件选择
   const handleFileSelect = async (e: React.ChangeEvent<HTMLInputElement>) => {