diff --git a/src/packages/uploader/demos/h5/demo1.tsx b/src/packages/uploader/demos/h5/demo1.tsx
index 78910105f..652b60351 100644
--- a/src/packages/uploader/demos/h5/demo1.tsx
+++ b/src/packages/uploader/demos/h5/demo1.tsx
@@ -7,6 +7,7 @@ const Demo1 = () => {
   const [list, setList] = useState<FileItem[]>([
     {
       url: 'https://m.360buyimg.com/babel/jfs/t1/164410/22/25162/93384/616eac6cE6c711350/0cac53c1b82e1b05.gif',
+      uid: 133,
     },
   ])
 
diff --git a/src/packages/uploader/demos/h5/demo2.tsx b/src/packages/uploader/demos/h5/demo2.tsx
index 9982e3509..690f69d11 100644
--- a/src/packages/uploader/demos/h5/demo2.tsx
+++ b/src/packages/uploader/demos/h5/demo2.tsx
@@ -6,33 +6,39 @@ import { FileItem } from '../../file-item'
 const Demo2 = () => {
   const defaultList: FileItem[] = [
     {
+      uid: 111,
       name: '文件文件文件文件1文件文件文件文件1文件文件文件文件1.png',
       url: 'https://m.360buyimg.com/babel/jfs/t1/164410/22/25162/93384/616eac6cE6c711350/0cac53c1b82e1b05.gif',
       status: 'success',
       message: '上传成功',
     },
     {
+      uid: 222,
       name: '文件2.png',
       url: 'https://m.360buyimg.com/babel/jfs/t1/164410/22/25162/93384/616eac6cE6c711350/0cac53c1b82e1b05.gif',
       status: 'success',
       message: '上传成功',
     },
     {
+      uid: 333,
       url: 'https://m.360buyimg.com/babel/jfs/t1/164410/22/25162/93384/616eac6cE6c711350/0cac53c1b82e1b05.gif',
       status: 'uploading',
     },
     {
+      uid: 444,
       url: 'https://m.360buyimg.com/babel/jfs/t1/164410/22/25162/93384/616eac6cE6c711350/0cac53c1b82e1b05.gif',
       status: 'error',
       message: '上传失败',
       failIcon: <Star style={{ color: 'white' }} />,
     },
     {
+      uid: 555,
       url: 'https://m.360buyimg.com/babel/jfs/t1/164410/22/25162/93384/616eac6cE6c711350/0cac53c1b82e1b05.gif',
       status: 'error',
       message: '上传失败',
     },
     {
+      uid: 666,
       url: 'https://m.360buyimg.com/babel/jfs/t1/164410/22/25162/93384/616eac6cE6c711350/0cac53c1b82e1b05.gif',
       status: 'uploading',
       message: '上传中...',
diff --git a/src/packages/uploader/demos/taro/demo1.tsx b/src/packages/uploader/demos/taro/demo1.tsx
index f999aef32..5b60862b6 100644
--- a/src/packages/uploader/demos/taro/demo1.tsx
+++ b/src/packages/uploader/demos/taro/demo1.tsx
@@ -10,6 +10,7 @@ const Demo1 = () => {
   const [list, setList] = useState<FileItem[]>([
     {
       url: demoUrl,
+      uid: 133,
     },
   ])
 
diff --git a/src/packages/uploader/demos/taro/demo2.tsx b/src/packages/uploader/demos/taro/demo2.tsx
index f910b3e76..7a3256280 100644
--- a/src/packages/uploader/demos/taro/demo2.tsx
+++ b/src/packages/uploader/demos/taro/demo2.tsx
@@ -6,33 +6,39 @@ import { FileItem } from '../../file-item'
 const Demo2 = () => {
   const defaultList: FileItem[] = [
     {
+      uid: 111,
       name: '文件文件文件文件1文件文件文件文件1文件文件文件文件1.png',
       url: 'https://m.360buyimg.com/babel/jfs/t1/164410/22/25162/93384/616eac6cE6c711350/0cac53c1b82e1b05.gif',
       status: 'success',
       message: '上传成功',
     },
     {
+      uid: 222,
       name: '文件2.png',
       url: 'https://m.360buyimg.com/babel/jfs/t1/164410/22/25162/93384/616eac6cE6c711350/0cac53c1b82e1b05.gif',
       status: 'success',
       message: '上传成功',
     },
     {
+      uid: 333,
       url: 'https://m.360buyimg.com/babel/jfs/t1/164410/22/25162/93384/616eac6cE6c711350/0cac53c1b82e1b05.gif',
       status: 'uploading',
     },
     {
+      uid: 444,
       url: 'https://m.360buyimg.com/babel/jfs/t1/164410/22/25162/93384/616eac6cE6c711350/0cac53c1b82e1b05.gif',
       status: 'error',
       message: '上传失败',
       failIcon: <Star style={{ color: 'white' }} />,
     },
     {
+      uid: 555,
       url: 'https://m.360buyimg.com/babel/jfs/t1/164410/22/25162/93384/616eac6cE6c711350/0cac53c1b82e1b05.gif',
       status: 'error',
       message: '上传失败',
     },
     {
+      uid: 666,
       url: 'https://m.360buyimg.com/babel/jfs/t1/164410/22/25162/93384/616eac6cE6c711350/0cac53c1b82e1b05.gif',
       status: 'uploading',
       message: '上传中...',
diff --git a/src/packages/uploader/preview.taro.tsx b/src/packages/uploader/preview.taro.tsx
index 43a8897b6..4d5c49121 100644
--- a/src/packages/uploader/preview.taro.tsx
+++ b/src/packages/uploader/preview.taro.tsx
@@ -33,7 +33,7 @@ export const Preview: React.FunctionComponent<any> = ({
         fileList.map((item: FileItem, index: number) => {
           const {
             status = 'success',
-            uid,
+            uid = index,
             url,
             message = '',
             name = '',
diff --git a/src/packages/uploader/preview.tsx b/src/packages/uploader/preview.tsx
index f94a9392d..177dcd88d 100644
--- a/src/packages/uploader/preview.tsx
+++ b/src/packages/uploader/preview.tsx
@@ -27,7 +27,7 @@ export const Preview: React.FunctionComponent<any> = ({
         fileList.map((item: FileItem, index: number) => {
           const {
             status = 'success',
-            uid,
+            uid = index,
             url,
             message = '',
             name = '',