diff --git a/backend/internal/handler/user_data.go b/backend/internal/handler/user_data.go
index d48d74e3d..d3aed32c3 100644
--- a/backend/internal/handler/user_data.go
+++ b/backend/internal/handler/user_data.go
@@ -128,6 +128,27 @@ func RegisterUserDataRoutes(r *gin.RouterGroup, svc *service.Service) {
 		}
 		ok(c, gin.H{"resource": resource})
 	})
+	r.GET("/resources/:id/oss-url", func(c *gin.Context) {
+		user, err := currentUser(c, svc)
+		if err != nil {
+			failService(c, err)
+			return
+		}
+		resource, err := svc.Resource(user.ID, c.Param("id"))
+		if err != nil {
+			fail(c, http.StatusNotFound, err)
+			return
+		}
+		ossURL, err := svc.DirectResourceURL(user.ID, resource.ID)
+		if err != nil {
+			failService(c, err)
+			return
+		}
+		// 签名地址只用于当前复制动作，禁止浏览器或中间代理缓存。
+		c.Header("Cache-Control", "private, no-store")
+		c.Header("Referrer-Policy", "no-referrer")
+		ok(c, gin.H{"url": ossURL})
+	})
 	r.GET("/resources/:id/file", func(c *gin.Context) {
 		user, err := currentUser(c, svc)
 		if err != nil {
diff --git a/backend/internal/service/resource.go b/backend/internal/service/resource.go
index 1321f6e86..7b4c70c5b 100644
--- a/backend/internal/service/resource.go
+++ b/backend/internal/service/resource.go
@@ -69,7 +69,7 @@ func (s *Service) DirectResourceURL(userID string, id string) (string, error) {
 		return "", BadAuthRequest("资源尚未上传完成")
 	}
 	if resource.Provider == "local" {
-		return "", nil
+		return "", BadAuthRequest("当前资源未存储在 OSS")
 	}
 	setting, err := s.ossSettingForResource(userID, resource)
 	if err != nil {
diff --git a/web/src/components/canvas/canvas-context-menu.tsx b/web/src/components/canvas/canvas-context-menu.tsx
index 4df865d73..ff09da4a4 100644
--- a/web/src/components/canvas/canvas-context-menu.tsx
+++ b/web/src/components/canvas/canvas-context-menu.tsx
@@ -1,11 +1,12 @@
 import { AnimatePresence, useReducedMotion } from "motion/react";
 import { useEffect, useState, type CSSProperties, type ReactNode } from "react";
-import { ChevronRight, Clapperboard, Clipboard, Copy, FileText, FolderOpen, FolderPlus, Image as ImageIcon, Layers3, Maximize2, MessageSquare, Music2, PanelTop, Plus, Redo2, Settings2, Trash2, Type, Undo2, Upload, Video } from "lucide-react";
+import { ChevronRight, Clapperboard, Clipboard, Copy, FileText, FolderOpen, FolderPlus, Image as ImageIcon, Layers3, Link2, Maximize2, MessageSquare, Music2, PanelTop, Plus, Redo2, Settings2, Trash2, Type, Undo2, Upload, Video } from "lucide-react";
 
 import { aceternityMotion } from "@/lib/aceternity-motion";
 import { SpotlightSurface } from "@/components/ui/aceternity/spotlight-surface";
 import { CanvasCreateCommandGrid, type CanvasCreateCommand } from "@/components/canvas/canvas-create-command-grid";
 import { canvasThemes } from "@/lib/canvas-theme";
+import { resourceIdFromStorageKey } from "@/services/api/resources";
 import { useThemeStore } from "@/stores/use-theme-store";
 import { CanvasNodeType, type CanvasNodeData, type CanvasWorkspaceMode, type ContextMenuState, type Position } from "@/types/canvas";
 
@@ -34,6 +35,7 @@ type CanvasNodeContextMenuProps = {
     onEditText: () => void;
     onGenerateImage: () => void;
     onCopyContent: () => void;
+    onCopyOssUrl: () => void;
     onToggleFrame: () => void;
 };
 
@@ -62,6 +64,7 @@ export function CanvasNodeContextMenu({
     onEditText,
     onGenerateImage,
     onCopyContent,
+    onCopyOssUrl,
     onToggleFrame,
 }: CanvasNodeContextMenuProps) {
     const theme = canvasThemes[useThemeStore((state) => state.theme)];
@@ -104,6 +107,7 @@ export function CanvasNodeContextMenu({
     const canOpenPreview = Boolean(isImage && hasNodeContent);
     const canOpenEditor = Boolean(node && (isText || isImage || isVideo));
     const canGenerateFromText = Boolean(isText && hasNodeContent);
+    const canCopyOssUrl = Boolean((isImage || isVideo) && resourceIdFromStorageKey(node?.metadata?.storageKey));
     const position = getContextMenuPosition(menu);
 
     return (
@@ -146,6 +150,7 @@ export function CanvasNodeContextMenu({
                             <MenuButton icon={<Copy className="size-4" />} label={isFrame ? "复制背板及内容" : "复制节点"} shortcut="⌘C" onClick={() => runAction(onCopyNode)} />
                             {isImage ? <MenuButton icon={<ImageIcon className="size-4" />} label="复制图片" disabled={!hasNodeContent} onClick={() => runAction(onCopyContent)} /> : null}
                             {isText ? <MenuButton icon={<Clipboard className="size-4" />} label="复制文本" disabled={!hasNodeContent} onClick={() => runAction(onCopyContent)} /> : null}
+                            {isImage || isVideo ? <MenuButton icon={<Link2 className="size-4" />} label="复制 OSS 地址" disabled={!canCopyOssUrl} onClick={() => runAction(onCopyOssUrl)} /> : null}
                             <MenuButton icon={<Copy className="size-4" />} label={isFrame ? "创建背板副本" : "创建参数变体"} shortcut="⌘D" onClick={() => runAction(onDuplicate)} />
                             <MenuButton icon={<Clipboard className="size-4" />} label="粘贴" shortcut="⌘V" disabled={!canPaste} onClick={() => runAction(onPaste)} />
                             <MenuButton icon={<Trash2 className="size-4" />} label={isFrame ? "删除背板" : "删除节点"} danger onClick={() => runAction(onDelete)} />
diff --git a/web/src/pages/canvas/canvas-project-context-menu.tsx b/web/src/pages/canvas/canvas-project-context-menu.tsx
index 0f9d94b9e..03ccd3d7a 100644
--- a/web/src/pages/canvas/canvas-project-context-menu.tsx
+++ b/web/src/pages/canvas/canvas-project-context-menu.tsx
@@ -28,6 +28,7 @@ type CanvasProjectContextMenuProps = {
     onEditText: (node: CanvasNodeData) => void;
     onGenerateImage: (node: CanvasNodeData) => void;
     onCopyContent: (node: CanvasNodeData | null) => void;
+    onCopyOssUrl: (node: CanvasNodeData | null) => void;
     onToggleFrame: (node: CanvasNodeData) => void;
 };
 
@@ -81,6 +82,7 @@ export function CanvasProjectContextMenu({ menu, node, screenToCanvas, ...props
                 if (node) props.onGenerateImage(node);
             }}
             onCopyContent={() => props.onCopyContent(node)}
+            onCopyOssUrl={() => props.onCopyOssUrl(node)}
             onToggleFrame={() => {
                 if (node?.type === CanvasNodeType.Frame) props.onToggleFrame(node);
             }}
diff --git a/web/src/pages/canvas/project.tsx b/web/src/pages/canvas/project.tsx
index aaff37610..352cab18f 100644
--- a/web/src/pages/canvas/project.tsx
+++ b/web/src/pages/canvas/project.tsx
@@ -3,6 +3,8 @@ import type { MouseEvent as ReactMouseEvent } from "react";
 import { useParams, useSearchParams } from "react-router";
 import { useConfigStore, useEffectiveConfig } from "@/stores/use-config-store";
 import { uploadMediaFile } from "@/services/file-storage";
+import { getResourceOSSUrl } from "@/services/api/resources";
+import copyToClipboard from "copy-to-clipboard";
 import { nanoid } from "nanoid";
 import { canvasThemes, type CanvasBackgroundMode } from "@/lib/canvas-theme";
 import { persistCanvasMediaPerformanceMode, readCanvasMediaPerformanceMode } from "@/lib/canvas/canvas-performance-mode";
@@ -914,6 +916,20 @@ function InfiniteCanvasPage() {
         [message],
     );
 
+    const copyNodeOssUrlToClipboard = useCallback(
+        async (node: CanvasNodeData | null) => {
+            try {
+                const ossURL = await getResourceOSSUrl(node?.metadata?.storageKey);
+                if (navigator.clipboard?.writeText) await navigator.clipboard.writeText(ossURL);
+                else if (!copyToClipboard(ossURL)) throw new Error("当前浏览器不支持写入剪贴板");
+                message.success("临时 OSS 地址已复制");
+            } catch (error) {
+                message.error(error instanceof Error ? error.message : "复制 OSS 地址失败");
+            }
+        },
+        [message],
+    );
+
     const handleCanvasContextMenu = useCallback(
         (event: ReactMouseEvent) => {
             const target = event.target instanceof Element ? event.target : null;
@@ -1439,6 +1455,7 @@ function InfiniteCanvasPage() {
                     onEditText={openTextEditor}
                     onGenerateImage={generateImageFromTextNode}
                     onCopyContent={(node) => { void copyNodeContentToClipboard(node); }}
+                    onCopyOssUrl={(node) => { void copyNodeOssUrlToClipboard(node); }}
                     onToggleFrame={(node) => toggleFrameCollapsed(node.id)}
                 />
 
diff --git a/web/src/services/api/resources.ts b/web/src/services/api/resources.ts
index d46c399cd..d89c4f2b2 100644
--- a/web/src/services/api/resources.ts
+++ b/web/src/services/api/resources.ts
@@ -115,6 +115,19 @@ export function getResource(id: string): Promise<RemoteResource> {
     return task;
 }
 
+export async function getResourceOSSUrl(storageKey?: string) {
+    const id = resourceIdFromStorageKey(storageKey);
+    if (!id) throw new Error("当前媒体尚未上传到后端资源存储");
+    try {
+        const data = await request<{ url: string }>(api.get(`/resources/${encodeURIComponent(id)}/oss-url`));
+        if (!data.url) throw new Error("后端未返回 OSS 地址");
+        return data.url;
+    } catch (error) {
+        if (axios.isAxiosError<BackendEnvelope<unknown>>(error)) throw new Error(error.response?.data.msg || error.message || "获取 OSS 地址失败");
+        throw error;
+    }
+}
+
 function resourceCacheKey(id: string) {
     return `${getActiveUserScope()}:${id}`;
 }