diff --git a/packages/backend/server/src/__tests__/utils/workspace.ts b/packages/backend/server/src/__tests__/utils/workspace.ts
index 9918950812..b3a61ce9ef 100644
--- a/packages/backend/server/src/__tests__/utils/workspace.ts
+++ b/packages/backend/server/src/__tests__/utils/workspace.ts
@@ -85,6 +85,21 @@ export async function updateWorkspace(
   return res.updateWorkspace.public;
 }
 
+export async function deleteWorkspace(
+  app: TestingApp,
+  workspaceId: string
+): Promise<boolean> {
+  const res = await app.gql(
+    `
+      mutation {
+        deleteWorkspace(id: "${workspaceId}")
+      }
+    `
+  );
+
+  return res.deleteWorkspace;
+}
+
 export async function publishDoc(
   app: TestingApp,
   workspaceId: string,
diff --git a/packages/backend/server/src/__tests__/workspace/blobs.e2e.ts b/packages/backend/server/src/__tests__/workspace/blobs.e2e.ts
index 963f214cdf..bf3e1ccdf0 100644
--- a/packages/backend/server/src/__tests__/workspace/blobs.e2e.ts
+++ b/packages/backend/server/src/__tests__/workspace/blobs.e2e.ts
@@ -1,10 +1,13 @@
 import test from 'ava';
+import Sinon from 'sinon';
 
+import { WorkspaceBlobStorage } from '../../core/storage/wrappers/blob';
 import { WorkspaceFeatureModel } from '../../models';
 import {
   collectAllBlobSizes,
   createTestingApp,
   createWorkspace,
+  deleteWorkspace,
   getWorkspaceBlobsSize,
   listBlobs,
   setBlob,
@@ -77,6 +80,25 @@ test('should list blobs', async t => {
   t.deepEqual(ret.sort(), [hash1, hash2].sort());
 });
 
+test('should auto delete blobs when workspace is deleted', async t => {
+  await app.signup('u1@affine.pro');
+
+  const workspace = await createWorkspace(app);
+  const buffer1 = Buffer.from([0, 0]);
+  await setBlob(app, workspace.id, buffer1);
+  const buffer2 = Buffer.from([0, 1]);
+  await setBlob(app, workspace.id, buffer2);
+  const size = await collectAllBlobSizes(app);
+  t.is(size, 4);
+  const blobs = await listBlobs(app, workspace.id);
+  t.is(blobs.length, 2);
+
+  const workspaceBlobStorage = Sinon.spy(app.get(WorkspaceBlobStorage));
+  await deleteWorkspace(app, workspace.id);
+  // should not emit workspace.blob.sync event
+  t.is(workspaceBlobStorage.syncBlobMeta.callCount, 0);
+});
+
 test('should calc blobs size', async t => {
   await app.signup('u1@affine.pro');
 
diff --git a/packages/backend/server/src/core/storage/wrappers/blob.ts b/packages/backend/server/src/core/storage/wrappers/blob.ts
index 5c3959fa55..274031a492 100644
--- a/packages/backend/server/src/core/storage/wrappers/blob.ts
+++ b/packages/backend/server/src/core/storage/wrappers/blob.ts
@@ -42,7 +42,7 @@ export class WorkspaceBlobStorage {
     return this.provider.get(`${workspaceId}/${key}`);
   }
 
-  async list(workspaceId: string) {
+  async list(workspaceId: string, syncBlobMeta = true) {
     const blobsInDb = await this.db.blob.findMany({
       where: {
         workspaceId,
@@ -59,7 +59,9 @@ export class WorkspaceBlobStorage {
       blob.key = blob.key.slice(workspaceId.length + 1);
     });
 
-    this.trySyncBlobsMeta(workspaceId, blobs);
+    if (syncBlobMeta) {
+      this.trySyncBlobsMeta(workspaceId, blobs);
+    }
 
     return blobs.map(blob => ({
       key: blob.key,
@@ -182,7 +184,8 @@ export class WorkspaceBlobStorage {
 
   @OnEvent('workspace.deleted')
   async onWorkspaceDeleted({ id }: Events['workspace.deleted']) {
-    const blobs = await this.list(id);
+    // do not sync blob meta to DB
+    const blobs = await this.list(id, false);
 
     // to reduce cpu time holding
     blobs.forEach(blob => {