diff --git a/components/canvas/nodes/ImageNode.tsx b/components/canvas/nodes/ImageNode.tsx
index 4c29dbd..d64ad93 100644
--- a/components/canvas/nodes/ImageNode.tsx
+++ b/components/canvas/nodes/ImageNode.tsx
@@ -20,6 +20,7 @@ import {
 } from "@/components/ui/dialog";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
+import { Textarea } from "@/components/ui/textarea";
 import { Tooltip, TooltipContent, TooltipTrigger, TooltipProvider } from "@/components/ui/tooltip";
 import { toast } from "sonner";
 import { useCanvasStore } from "@/store/canvas";
@@ -82,6 +83,38 @@ const sanitizeFileName = (name: string) => {
   return safe || "image";
 };
 
+const COMMON_ASPECT_RATIOS = [
+  "1:1",
+  "2:3",
+  "3:2",
+  "3:4",
+  "4:3",
+  "4:5",
+  "5:4",
+  "9:16",
+  "16:9",
+  "21:9",
+] as const;
+
+function guessNearestAspectRatio(width: number, height: number): string {
+  if (!width || !height) return "auto";
+  const target = width / height;
+  let best = "auto";
+  let minDiff = Number.POSITIVE_INFINITY;
+
+  for (const ratio of COMMON_ASPECT_RATIOS) {
+    const [w, h] = ratio.split(":").map(Number);
+    const value = w / h;
+    const diff = Math.abs(target - value);
+    if (diff < minDiff) {
+      minDiff = diff;
+      best = ratio;
+    }
+  }
+
+  return best;
+}
+
 /**
  * 在图片上绘制标记点，返回带标记的图片 base64
  */
@@ -177,8 +210,10 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
   const [angleDialogOpen, setAngleDialogOpen] = useState(false);
   const [sceneFusionDialogOpen, setSceneFusionDialogOpen] = useState(false);
   const [resizeDialogOpen, setResizeDialogOpen] = useState(false);
+  const [promptDialogOpen, setPromptDialogOpen] = useState(false);
   const [resizeWidth, setResizeWidth] = useState(1024);
   const [resizeHeight, setResizeHeight] = useState(1024);
+  const [regeneratePrompt, setRegeneratePrompt] = useState("");
   const [isUploading, setIsUploading] = useState(false);
   const [annotatorOpen, setAnnotatorOpen] = useState(false);
   const [fullscreenPreviewOpen, setFullscreenPreviewOpen] = useState(false);
@@ -235,6 +270,7 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
     if (!isSelected) {
       setTextEditPanelOpen(false);
       setIsEditingTitle(false);
+      setPromptDialogOpen(false);
     }
   }, [isSelected]);
 
@@ -243,6 +279,12 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
       setDraftTitle(getImageNodeTitle(data, node.id));
     }
   }, [data, isEditingTitle, node.id]);
+
+  useEffect(() => {
+    if (promptDialogOpen) {
+      setRegeneratePrompt(data.prompt || "");
+    }
+  }, [data.prompt, promptDialogOpen]);
   
   // 🆕 处理图片点击标注
   const handlePickerClick = useCallback(async (e: React.MouseEvent<HTMLImageElement>) => {
@@ -668,6 +710,7 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
       'scene-fusion': '详情替换',
       'annotate': '图片标注',
       'text-edit': '编辑文字',
+      'prompt-regenerate': '提示词重绘',
     };
     return names[action] || action;
   };
@@ -704,6 +747,11 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
       await handleOpenTextEdit();
       return;
     }
+    if (action === "prompt-regenerate") {
+      setRegeneratePrompt(data.prompt || "");
+      setPromptDialogOpen(true);
+      return;
+    }
 
     const actionName = getActionName(action);
 
@@ -955,6 +1003,92 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
     }
   };
 
+  // 基于当前图片+新提示词重绘
+  const handlePromptRegenerate = async () => {
+    if (!data.src) return;
+    if (!isHttpImageUrl(data.src)) {
+      toast.error("仅支持 URL 图片，不允许 base64 传输");
+      return;
+    }
+    const promptText = regeneratePrompt.trim();
+    if (!promptText) {
+      toast.error("请输入提示词");
+      return;
+    }
+    if (isProcessing) {
+      toast.info("正在处理中，请稍候...");
+      return;
+    }
+
+    setPromptDialogOpen(false);
+    setIsProcessing(true);
+
+    const newNodeId = addNode({
+      type: "image",
+      position: {
+        x: node.position.x + node.size.width + 20,
+        y: node.position.y,
+      },
+      size: { width: node.size.width, height: node.size.height },
+      data: {
+        src: "",
+        status: "generating",
+        prompt: promptText,
+        title: `${displayTitle}-重绘`,
+        originalSrc: data.src,
+      },
+      connections: [node.id],
+    });
+
+    try {
+      const aspectRatio = guessNearestAspectRatio(node.size.width, node.size.height);
+      const result = await imageGenerationService.generateImage({
+        prompt: promptText,
+        referenceImage: data.src,
+        aspectRatio,
+        imageCount: 1,
+      });
+
+      const image = result.data?.images?.[0];
+      if (result.success && image?.originalUrl) {
+        updateNode(newNodeId, {
+          data: {
+            src: image.originalUrl,
+            status: "completed",
+            prompt: promptText,
+            title: `${promptText.slice(0, 24) || displayTitle}-重绘`,
+            originalSrc: data.src,
+          },
+        });
+        toast.success("已根据新提示词生成图片");
+      } else {
+        updateNode(newNodeId, {
+          data: {
+            src: "",
+            status: "failed",
+            prompt: "提示词重绘失败",
+            title: `${displayTitle}-重绘失败`,
+            originalSrc: data.src,
+          },
+        });
+        toast.error(result.error || "重绘失败");
+      }
+    } catch (error) {
+      updateNode(newNodeId, {
+        data: {
+          src: "",
+          status: "failed",
+          prompt: "提示词重绘失败",
+          title: `${displayTitle}-重绘失败`,
+          originalSrc: data.src,
+        },
+      });
+      toast.error("重绘失败");
+    } finally {
+      setIsProcessing(false);
+    }
+  };
+
   // 下载图片 - 通过 fetch 获取图片数据实现真正的下载（避免跨域问题导致跳转）
   const handleDownload = async () => {
     if (!data.src) return;
@@ -1188,6 +1322,10 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
                   <Layers className="h-4 w-4 mr-2" />
                   详情替换
                 </DropdownMenuItem>
+                <DropdownMenuItem onClick={() => handleAction('prompt-regenerate')}>
+                  <RefreshCw className="h-4 w-4 mr-2" />
+                  提示词重绘
+                </DropdownMenuItem>
                 <DropdownMenuItem onClick={() => handleAction('text-edit')}>
                   <Type className="h-4 w-4 mr-2" />
                   编辑文字
@@ -1290,6 +1428,41 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
           </DialogFooter>
         </DialogContent>
       </Dialog>
+
+      {/* 提示词重绘对话框 */}
+      <Dialog open={promptDialogOpen} onOpenChange={setPromptDialogOpen}>
+        <DialogContent className="sm:max-w-[560px]">
+          <DialogHeader>
+            <DialogTitle className="flex items-center gap-2">
+              <RefreshCw className="h-5 w-5" />
+              提示词重绘
+            </DialogTitle>
+          </DialogHeader>
+          <div className="space-y-3 py-2">
+            <p className="text-sm text-muted-foreground">
+              在保留当前图片主体的基础上，用新提示词生成一张新图。原图不会被覆盖。
+            </p>
+            <div className="space-y-2">
+              <Label htmlFor={`prompt-regenerate-${node.id}`}>新提示词</Label>
+              <Textarea
+                id={`prompt-regenerate-${node.id}`}
+                value={regeneratePrompt}
+                onChange={(e) => setRegeneratePrompt(e.target.value)}
+                placeholder="例如：保持主体不变，把背景改成黄昏海边，氛围光影更柔和，细节更丰富"
+                rows={6}
+                className="resize-y"
+              />
+            </div>
+          </div>
+          <DialogFooter>
+            <Button variant="outline" onClick={() => setPromptDialogOpen(false)}>取消</Button>
+            <Button onClick={handlePromptRegenerate} disabled={isProcessing || !regeneratePrompt.trim()}>
+              {isProcessing ? <Loader2 className="h-4 w-4 mr-2 animate-spin" /> : <RefreshCw className="h-4 w-4 mr-2" />}
+              开始重绘
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
       
       {/* 工具栏使用 Portal 渲染到 body，避免被裁剪 */}
       {isSelected && data.src && typeof document !== 'undefined' && createPortal(
@@ -1428,6 +1601,22 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
               </TooltipTrigger>
               <TooltipContent side="bottom" className="text-xs">编辑文字</TooltipContent>
             </Tooltip>
+
+            {/* 提示词重绘 */}
+            <Tooltip>
+              <TooltipTrigger asChild>
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  disabled={isProcessing}
+                  className="h-8 w-8 rounded-full hover:bg-gray-100 dark:hover:bg-white/10 disabled:opacity-50 disabled:pointer-events-none"
+                  onClick={() => handleAction('prompt-regenerate')}
+                >
+                  <RefreshCw className="h-4 w-4" />
+                </Button>
+              </TooltipTrigger>
+              <TooltipContent side="bottom" className="text-xs">提示词重绘</TooltipContent>
+            </Tooltip>
             
             {/* 角度编辑 */}
             <Tooltip>