diff --git a/src/components/image-editor/ImageCanvasEditorView.test.tsx b/src/components/image-editor/ImageCanvasEditorView.test.tsx
index 34da2091..7c966ef2 100644
--- a/src/components/image-editor/ImageCanvasEditorView.test.tsx
+++ b/src/components/image-editor/ImageCanvasEditorView.test.tsx
@@ -1623,6 +1623,49 @@ describe('ImageCanvasEditorView', () => {
     expect(createEditorAssetMock).not.toHaveBeenCalled();
   });
 
+  it('saves canvas layout without embedding image payloads in layer snapshots', async () => {
+    loadEditorAssetLibraryMock.mockResolvedValueOnce({
+      folders: [
+        {
+          folderId: 'project',
+          label: '项目素材',
+          sortOrder: 0,
+          collapsed: false,
+          systemDefault: true,
+        },
+      ],
+      assets: [
+        {
+          assetId: 'asset-data-heavy',
+          folderId: 'project',
+          label: '大图素材',
+          imageSrc: 'data:image/png;base64,'.concat('a'.repeat(4000)),
+          width: 1024,
+          height: 768,
+          sourceType: 'uploaded',
+        },
+      ],
+    });
+    render(<ImageCanvasEditorView />);
+
+    await screen.findByRole('button', { name: '添加大图素材' });
+    fireEvent.click(screen.getByRole('button', { name: '添加大图素材' }));
+
+    await waitFor(() => {
+      expect(saveEditorProjectLayoutMock).toHaveBeenCalled();
+    });
+    const layoutCalls = saveEditorProjectLayoutMock.mock.calls;
+    const lastLayout = layoutCalls.at(-1)?.[1];
+
+    expect(lastLayout.layers).toEqual(
+      expect.arrayContaining([
+        expect.not.objectContaining({
+          src: expect.stringMatching(/^data:image/u),
+        }),
+      ]),
+    );
+  });
+
   it('adds an asset library image to the canvas with pointer dragging', async () => {
     await renderLoadedEditor();
 
diff --git a/src/components/image-editor/ImageCanvasEditorView.tsx b/src/components/image-editor/ImageCanvasEditorView.tsx
index 17e8059f..fce14e00 100644
--- a/src/components/image-editor/ImageCanvasEditorView.tsx
+++ b/src/components/image-editor/ImageCanvasEditorView.tsx
@@ -539,7 +539,6 @@ function serializeLayer(layer: CanvasLayer): EditorProjectLayerSnapshot {
     layerId: layer.id,
     resourceId: layer.resourceId,
     title: layer.title,
-    src: layer.src,
     x: layer.x,
     y: layer.y,
     width: layer.width,
@@ -565,10 +564,14 @@ function serializeLayer(layer: CanvasLayer): EditorProjectLayerSnapshot {
   };
 }
 
-function hydrateLayer(snapshot: EditorProjectLayerSnapshot): CanvasLayer | null {
+function hydrateLayer(
+  snapshot: EditorProjectLayerSnapshot,
+  resourcesById: Map<string, { imageSrc: string }>,
+): CanvasLayer | null {
   const resourceId = typeof snapshot.resourceId === 'string' ? snapshot.resourceId : '';
   const layerId = typeof snapshot.layerId === 'string' ? snapshot.layerId : '';
-  const src = typeof snapshot.src === 'string' ? snapshot.src : '';
+  const snapshotSrc = typeof snapshot.src === 'string' ? snapshot.src : '';
+  const src = snapshotSrc || resourcesById.get(resourceId)?.imageSrc || '';
   const title = typeof snapshot.title === 'string' ? snapshot.title : '画布图片';
   if (!resourceId || !layerId || !src) {
     return null;
@@ -1221,8 +1224,14 @@ export function ImageCanvasEditorView() {
         setProjectTitle(nextProjectTitle);
         setProjectRenameValue(nextProjectTitle);
         setViewport(project.viewport);
+        const resourcesById = new Map(
+          project.resources.map((resource) => [
+            resource.resourceId,
+            { imageSrc: resource.imageSrc },
+          ]),
+        );
         const hydratedLayers = project.layers
-          .map(hydrateLayer)
+          .map((layer) => hydrateLayer(layer, resourcesById))
           .filter((layer): layer is CanvasLayer => Boolean(layer));
         layerCounterRef.current = hydratedLayers.length;
         setLayers(hydratedLayers);
@@ -2099,11 +2108,19 @@ export function ImageCanvasEditorView() {
                 }
               : currentLayer,
           );
-          if (options.saveLayout) {
-            void saveProjectLayoutNow(nextLayers).catch(() => {});
-          }
           return nextLayers;
         });
+        if (options.saveLayout) {
+          const latestLayers = layersRef.current.map((currentLayer) =>
+            currentLayer.id === layer.id
+              ? {
+                  ...currentLayer,
+                  resourceId: resource.resourceId,
+                }
+              : currentLayer,
+          );
+          void saveProjectLayoutNow(latestLayers).catch(() => {});
+        }
         return resource;
       })
       .catch(() => {
@@ -2228,9 +2245,7 @@ export function ImageCanvasEditorView() {
     );
     captureCanvasHistory();
     setLayers((currentLayers) => {
-      const nextLayers = [...currentLayers, nextLayer];
-      void saveProjectLayoutNow(nextLayers).catch(() => {});
-      return nextLayers;
+      return [...currentLayers, nextLayer];
     });
     selectSingleLayer(nextLayer.id);
     setHoveredLayerId(null);
@@ -2853,7 +2868,6 @@ export function ImageCanvasEditorView() {
                   }
                 : currentLayer,
             );
-            void saveProjectLayoutNow(nextLayers).catch(() => {});
             return nextLayers;
           });
         }