diff --git a/packages/plugins/@nocobase/plugin-file-manager/src/client/templates/file.ts b/packages/plugins/@nocobase/plugin-file-manager/src/client/templates/file.ts
index 9bf39430d3..46d27c5367 100644
--- a/packages/plugins/@nocobase/plugin-file-manager/src/client/templates/file.ts
+++ b/packages/plugins/@nocobase/plugin-file-manager/src/client/templates/file.ts
@@ -115,7 +115,7 @@ export class FileCollectionTemplate extends CollectionTemplate {
       // 用于预览
       {
         interface: 'url',
-        type: 'string',
+        type: 'text',
         name: 'preview',
         field: 'url', // 直接引用 url 字段
         deletable: false,
diff --git a/packages/plugins/@nocobase/plugin-file-manager/src/server/__tests__/migrations/20250225112112-increase-url-length.test.ts b/packages/plugins/@nocobase/plugin-file-manager/src/server/__tests__/migrations/20250225225034-increase-url-length.test.ts
similarity index 98%
rename from packages/plugins/@nocobase/plugin-file-manager/src/server/__tests__/migrations/20250225112112-increase-url-length.test.ts
rename to packages/plugins/@nocobase/plugin-file-manager/src/server/__tests__/migrations/20250225225034-increase-url-length.test.ts
index 99ec267160..84f4bb5408 100644
--- a/packages/plugins/@nocobase/plugin-file-manager/src/server/__tests__/migrations/20250225112112-increase-url-length.test.ts
+++ b/packages/plugins/@nocobase/plugin-file-manager/src/server/__tests__/migrations/20250225225034-increase-url-length.test.ts
@@ -8,7 +8,7 @@
  */
 
 import { MockServer, createMockServer } from '@nocobase/test';
-import Migration from '../../migrations/20250225112112-increase-url-length';
+import Migration from '../../migrations/20250225225034-increase-url-length';
 import PluginCollectionManagerServer from '../../server';
 
 describe('file-manager > migrations', () => {
diff --git a/packages/plugins/@nocobase/plugin-file-manager/src/server/migrations/20250225112112-increase-url-length.ts b/packages/plugins/@nocobase/plugin-file-manager/src/server/migrations/20250225225034-increase-url-length.ts
similarity index 98%
rename from packages/plugins/@nocobase/plugin-file-manager/src/server/migrations/20250225112112-increase-url-length.ts
rename to packages/plugins/@nocobase/plugin-file-manager/src/server/migrations/20250225225034-increase-url-length.ts
index 01edbf70e9..a8b4671c7d 100644
--- a/packages/plugins/@nocobase/plugin-file-manager/src/server/migrations/20250225112112-increase-url-length.ts
+++ b/packages/plugins/@nocobase/plugin-file-manager/src/server/migrations/20250225225034-increase-url-length.ts
@@ -52,7 +52,7 @@ export default class extends Migration {
         await FieldRepo.update({
           filter: {
             collectionName: collection.name,
-            name: ['url', 'path'],
+            name: ['url', 'path', 'preview'],
           },
           values: {
             type: 'text',