diff --git a/src/components/image-editor/useImageCanvasGenerationWorkflow.test.tsx b/src/components/image-editor/useImageCanvasGenerationWorkflow.test.tsx
index 1f5199fa8..bc07c6f09 100644
--- a/src/components/image-editor/useImageCanvasGenerationWorkflow.test.tsx
+++ b/src/components/image-editor/useImageCanvasGenerationWorkflow.test.tsx
@@ -22,6 +22,8 @@ const generateEditorSoundEffectMock = vi.hoisted(() => vi.fn());
 const generateEditorBackgroundMusicMock = vi.hoisted(() => vi.fn());
 const editEditorImageMock = vi.hoisted(() => vi.fn());
 const renderCropExpandImageMock = vi.hoisted(() => vi.fn());
+const removeImageBackgroundMock = vi.hoisted(() => vi.fn());
+const resolveEditorImageReferenceDataUrlMock = vi.hoisted(() => vi.fn());
 
 vi.mock('../../services/image-editor/editorImageReference', async () => {
   const actual = await vi.importActual<
@@ -29,7 +31,7 @@ vi.mock('../../services/image-editor/editorImageReference', async () => {
   >('../../services/image-editor/editorImageReference');
   return {
     ...actual,
-    resolveEditorImageReferenceDataUrl: vi.fn(async (src: string) => src),
+    resolveEditorImageReferenceDataUrl: resolveEditorImageReferenceDataUrlMock,
     resolveEditorImageReferenceDataUrlForGeneration: vi.fn(
       async (src: string) => src,
     ),
@@ -57,6 +59,7 @@ vi.mock('./ImageCanvasRasterEditModel', async () => {
   >('./ImageCanvasRasterEditModel');
   return {
     ...actual,
+    removeImageBackground: removeImageBackgroundMock,
     renderCropExpandImage: renderCropExpandImageMock,
   };
 });
@@ -390,6 +393,12 @@ function GenerationWorkflowHarness({
       <button type="button" onClick={() => void workflow.submitCropExpand()}>
         完成裁扩
       </button>
+      <button
+        type="button"
+        onClick={() => void workflow.removeSelectedLayerBackground(layers[0]!)}
+      >
+        去除背景
+      </button>
       <button
         type="button"
         onClick={() =>
@@ -716,6 +725,9 @@ function GenerationWorkflowHarness({
 describe('useImageCanvasGenerationWorkflow', () => {
   beforeEach(() => {
     vi.clearAllMocks();
+    resolveEditorImageReferenceDataUrlMock.mockImplementation(
+      async (src: string) => src,
+    );
     window.localStorage.clear();
   });
 
@@ -1326,15 +1338,15 @@ describe('useImageCanvasGenerationWorkflow', () => {
     expect(screen.getByTestId('quick-edit-selection').textContent).toBe(
       'layer-source:none:0',
     );
-    fireEvent.click(screen.getByRole('button', { name: '选择快速编辑矩形框选' }));
+    fireEvent.click(
+      screen.getByRole('button', { name: '选择快速编辑矩形框选' }),
+    );
     fireEvent.click(screen.getByRole('button', { name: '快速编辑框选' }));
 
     expect(screen.getByTestId('quick-edit-selection').textContent).toBe(
       'layer-source:rect:1',
     );
-    expect(screen.getByTestId('quick-edit').textContent).toBe(
-      '-',
-    );
+    expect(screen.getByTestId('quick-edit').textContent).toBe('-');
 
     fireEvent.click(
       screen.getByRole('button', { name: '选择快速编辑椭圆框选' }),
@@ -1344,9 +1356,7 @@ describe('useImageCanvasGenerationWorkflow', () => {
     expect(screen.getByTestId('quick-edit-selection').textContent).toBe(
       'layer-source:ellipse:2',
     );
-    expect(screen.getByTestId('quick-edit').textContent).toBe(
-      '-',
-    );
+    expect(screen.getByTestId('quick-edit').textContent).toBe('-');
   });
 
   it('submits quick edits beside the source and fits source plus result', async () => {
@@ -1429,6 +1439,44 @@ describe('useImageCanvasGenerationWorkflow', () => {
     expect(screen.getByTestId('fit-count').textContent).toBe('1');
   });
 
+  it('resolves private character image before removing background', async () => {
+    resolveEditorImageReferenceDataUrlMock.mockResolvedValueOnce(
+      'data:image/png;base64,resolved-character',
+    );
+    removeImageBackgroundMock.mockResolvedValueOnce({
+      imageSrc: 'data:image/png;base64,no-background',
+      width: 512,
+      height: 768,
+    });
+    render(
+      <GenerationWorkflowHarness
+        initialLayers={[
+          createLayer({
+            assetKind: 'character',
+            objectKey: 'generated-character-drafts/editor/private.png',
+            src: '/api/assets/read-url?objectKey=generated-character-drafts/editor/private.png',
+          }),
+        ]}
+      />,
+    );
+
+    fireEvent.click(screen.getByRole('button', { name: '去除背景' }));
+
+    await waitFor(() => {
+      expect(resolveEditorImageReferenceDataUrlMock).toHaveBeenCalledWith(
+        'generated-character-drafts/editor/private.png',
+      );
+    });
+    await waitFor(() => {
+      expect(removeImageBackgroundMock).toHaveBeenCalledWith(
+        'data:image/png;base64,resolved-character',
+      );
+    });
+    expect(screen.getByTestId('layers').textContent).toContain(
+      'layer-source:源图:-:character',
+    );
+  });
+
   it('opens UI design extraction as a mark selection state before submitting', () => {
     render(<GenerationWorkflowHarness />);
 
@@ -1456,9 +1504,7 @@ describe('useImageCanvasGenerationWorkflow', () => {
 
     fireEvent.click(screen.getByRole('button', { name: '打开快速编辑' }));
     await waitFor(() => {
-      expect(screen.getByTestId('quick-edit').textContent).toBe(
-        '-',
-      );
+      expect(screen.getByTestId('quick-edit').textContent).toBe('-');
     });
     fireEvent.click(screen.getByRole('button', { name: '打开修改状态' }));
     fireEvent.click(screen.getByRole('button', { name: '打开UI素材框选' }));
diff --git a/src/components/image-editor/useImageCanvasGenerationWorkflow.ts b/src/components/image-editor/useImageCanvasGenerationWorkflow.ts
index c7678c7c7..2434de9ad 100644
--- a/src/components/image-editor/useImageCanvasGenerationWorkflow.ts
+++ b/src/components/image-editor/useImageCanvasGenerationWorkflow.ts
@@ -14,6 +14,7 @@ import type {
   EditorAssetSnapshot,
   EditorProjectSnapshot,
 } from '../../services/image-editor/editorProjectClient';
+import { resolveEditorImageReferenceDataUrl } from '../../services/image-editor/editorImageReference';
 import { resizeCropExpandFrame } from './ImageCanvasCropExpandModel';
 import type {
   CanvasGenerationDialogState,
@@ -468,8 +469,9 @@ export function useImageCanvasGenerationWorkflow({
     useState<UiAssetExtractionState | null>(null);
   const [quickEditSelectionState, setQuickEditSelectionState] =
     useState<UiAssetExtractionState | null>(null);
-  const quickEditSelectionStateRef =
-    useRef<UiAssetExtractionState | null>(null);
+  const quickEditSelectionStateRef = useRef<UiAssetExtractionState | null>(
+    null,
+  );
   const cropExpandPanelRef = useRef<CropExpandPanelState | null>(null);
   const cropExpandResizeDragRef = useRef<CropExpandResizeDragState | null>(
     null,
@@ -902,7 +904,8 @@ export function useImageCanvasGenerationWorkflow({
         .find(
           (dialog) =>
             dialog.generatedLayerId === sourceLayer.id ||
-            (!dialog.generatedLayerId && dialog.sourceLayerId === sourceLayer.id),
+            (!dialog.generatedLayerId &&
+              dialog.sourceLayerId === sourceLayer.id),
         );
       return createQuickEditPanelDraft(sourceLayer, {
         imageModel: sourceDialog?.imageModel,
@@ -1202,8 +1205,11 @@ export function useImageCanvasGenerationWorkflow({
         status: 'processing',
         errorMessage: undefined,
       });
+      const sourceImageSrc = await resolveEditorImageReferenceDataUrl(
+        cropExpandSourceLayer.objectKey?.trim() || cropExpandSourceLayer.src,
+      );
       const result = await renderCropExpandImage({
-        source: cropExpandSourceLayer.src,
+        source: sourceImageSrc,
         insets,
       });
       layerCounterRef.current += 1;
@@ -1263,7 +1269,10 @@ export function useImageCanvasGenerationWorkflow({
       setCropExpandPanel(null);
       setQuickEditPanel(null);
       try {
-        const result = await removeImageBackground(sourceLayer.src);
+        const sourceImageSrc = await resolveEditorImageReferenceDataUrl(
+          sourceLayer.objectKey?.trim() || sourceLayer.src,
+        );
+        const result = await removeImageBackground(sourceImageSrc);
         updateSourceLayer(sourceLayer.id, (layer) => ({
           ...layer,
           src: result.imageSrc,
@@ -1285,6 +1294,7 @@ export function useImageCanvasGenerationWorkflow({
       }
     },
     [
+      resolveEditorImageReferenceDataUrl,
       setActiveSidebarPanel,
       setImageContextMenu,
       setMetadataLayer,
@@ -1533,7 +1543,8 @@ export function useImageCanvasGenerationWorkflow({
               ...currentState,
               tool: currentState.tool === tool ? null : tool,
               draftMark: null,
-              status: currentState.status === 'failed' ? 'idle' : currentState.status,
+              status:
+                currentState.status === 'failed' ? 'idle' : currentState.status,
               errorMessage:
                 currentState.status === 'failed'
                   ? undefined