diff --git a/easyflow-ui-admin/app/src/components/ai-chat/useChatDocumentUploads.test.ts b/easyflow-ui-admin/app/src/components/ai-chat/useChatDocumentUploads.test.ts
index e77e9b20..b22e0508 100644
--- a/easyflow-ui-admin/app/src/components/ai-chat/useChatDocumentUploads.test.ts
+++ b/easyflow-ui-admin/app/src/components/ai-chat/useChatDocumentUploads.test.ts
@@ -16,6 +16,7 @@ vi.mock('./mediaApi', () => mediaApi);
 describe('useChatDocumentUploads', () => {
   afterEach(() => {
     vi.restoreAllMocks();
+    vi.unstubAllGlobals();
     Object.values(mediaApi).forEach((mock) => mock.mockReset());
   });
 
@@ -68,6 +69,44 @@ describe('useChatDocumentUploads', () => {
     );
   });
 
+  it('uses getRandomValues when randomUUID is unavailable', async () => {
+    const getRandomValues = vi.fn((values: Uint8Array) => {
+      values.fill(171);
+      return values;
+    });
+    vi.stubGlobal('crypto', { getRandomValues });
+    mediaApi.uploadAgentChatDocument.mockImplementation(
+      async (file, _context, uploadId) => ({
+        data: {
+          attachmentRef: 'document:chrome-90',
+          mimeType: file.type,
+          name: file.name,
+          size: file.size,
+          status: 'READY',
+          uploadId,
+        },
+        errorCode: 0,
+      }),
+    );
+
+    const uploads = useChatDocumentUploads();
+    await uploads.addFiles(
+      [new File(['document'], 'chrome-90.pdf', { type: 'application/pdf' })],
+      { agentId: 'agent-1', mode: 'FORMAL', sessionId: 'session-1' },
+    );
+
+    expect(getRandomValues).toHaveBeenCalled();
+    expect(mediaApi.uploadAgentChatDocument).toHaveBeenCalledWith(
+      expect.any(File),
+      { agentId: 'agent-1', mode: 'FORMAL', sessionId: 'session-1' },
+      expect.stringMatching(/^[a-f0-9]{32}$/),
+    );
+    expect(uploads.items.value[0]).toMatchObject({
+      status: 'ready',
+      uploadId: expect.stringMatching(/^[a-f0-9]{32}$/),
+    });
+  });
+
   it('exposes a server read failure without continuing to poll', async () => {
     mediaApi.uploadAgentChatDocument.mockResolvedValue({
       data: {
diff --git a/easyflow-ui-admin/packages/effects/common-ui/package.json b/easyflow-ui-admin/packages/effects/common-ui/package.json
index 405c7731..faf6419e 100644
--- a/easyflow-ui-admin/packages/effects/common-ui/package.json
+++ b/easyflow-ui-admin/packages/effects/common-ui/package.json
@@ -32,6 +32,7 @@
     "@easyflow/icons": "workspace:*",
     "@easyflow/locales": "workspace:*",
     "@easyflow/types": "workspace:*",
+    "@easyflow/utils": "workspace:*",
     "@incremark/theme": "1.0.2",
     "@incremark/vue": "1.0.2",
     "@vueuse/core": "catalog:",
diff --git a/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/useChatDocumentUploads.ts b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/useChatDocumentUploads.ts
index d9159ba6..99f2bd58 100644
--- a/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/useChatDocumentUploads.ts
+++ b/easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/useChatDocumentUploads.ts
@@ -2,6 +2,8 @@ import type { ChatDocumentAttachment } from './types';
 
 import { computed, ref } from 'vue';
 
+import { uuid } from '@easyflow/utils';
+
 const MAX_DOCUMENTS = 3;
 const MAX_TOTAL_BYTES = 30 * 1024 * 1024;
 const MAX_OFFICE_BYTES = 20 * 1024 * 1024;
@@ -61,7 +63,7 @@ function createLocalId() {
 }
 
 function createUploadId() {
-  return crypto.randomUUID().replaceAll('-', '');
+  return uuid().replaceAll('-', '');
 }
 
 function extensionOf(file: File) {
@@ -170,11 +172,11 @@ export function createChatDocumentUploads(api: ChatDocumentUploadApi) {
     context: ChatDocumentUploadContext,
   ) {
     if (!item.file) return;
-    item.uploadId ||= createUploadId();
     item.status = 'uploading';
     item.error = undefined;
     const currentLifecycle = lifecycle;
     try {
+      item.uploadId ||= createUploadId();
       const response = await api.upload(item.file, context, item.uploadId);
       if (response.errorCode !== 0 || !response.data) {
         throw new Error(response.message || '文档上传失败');
diff --git a/easyflow-ui-admin/pnpm-lock.yaml b/easyflow-ui-admin/pnpm-lock.yaml
index 618137da..1d610abd 100644
--- a/easyflow-ui-admin/pnpm-lock.yaml
+++ b/easyflow-ui-admin/pnpm-lock.yaml
@@ -1441,6 +1441,9 @@ importers:
       '@easyflow/types':
         specifier: workspace:*
         version: link:../../types
+      '@easyflow/utils':
+        specifier: workspace:*
+        version: link:../../utils
       '@incremark/theme':
         specifier: 1.0.2
         version: 1.0.2