diff --git a/example/pages/uploader/index.js b/example/pages/uploader/index.js
index ef14f611..78f82fa9 100644
--- a/example/pages/uploader/index.js
+++ b/example/pages/uploader/index.js
@@ -5,7 +5,7 @@ Page({
     fileList1: [],
     fileList2: [
       { url: 'https://img.yzcdn.cn/vant/leaf.jpg' },
-      { url: 'https://img.yzcdn.cn/vant/tree.jpg' }
+      { url: 'https://img.yzcdn.cn/vant/tree.jpg' },
     ],
     fileList3: [{ url: 'https://img.yzcdn.cn/vant/sand.jpg' }],
     fileList4: [],
@@ -17,14 +17,14 @@ Page({
       {
         url: 'https://img.yzcdn.cn/vant/leaf.jpg',
         status: 'uploading',
-        message: '上传中'
+        message: '上传中',
       },
       {
         url: 'https://img.yzcdn.cn/vant/tree.jpg',
         status: 'failed',
-        message: '上传失败'
-      }
-    ]
+        message: '上传失败',
+      },
+    ],
   },
 
   beforeRead(event) {
@@ -39,6 +39,7 @@ Page({
 
   afterRead(event) {
     const { file, name } = event.detail;
+    console.log(JSON.stringify(file, null, 2));
     const fileList = this.data[`fileList${name}`];
 
     this.setData({ [`fileList${name}`]: fileList.concat(file) });
@@ -67,12 +68,12 @@ Page({
         this.uploadFilePromise(`my-photo${index}.png`, file)
       );
       Promise.all(uploadTasks)
-        .then(data => {
+        .then((data) => {
           wx.showToast({ title: '上传成功', icon: 'none' });
-          const fileList = data.map(item => ({ url: item.fileID }));
+          const fileList = data.map((item) => ({ url: item.fileID }));
           this.setData({ cloudPath: data, fileList6: fileList });
         })
-        .catch(e => {
+        .catch((e) => {
           wx.showToast({ title: '上传失败', icon: 'none' });
           console.log(e);
         });
@@ -82,7 +83,7 @@ Page({
   uploadFilePromise(fileName, chooseResult) {
     return wx.cloud.uploadFile({
       cloudPath: fileName,
-      filePath: chooseResult.path
+      filePath: chooseResult.path,
     });
-  }
+  },
 });
diff --git a/packages/common/utils.ts b/packages/common/utils.ts
index 9cf3d061..d3285f7d 100644
--- a/packages/common/utils.ts
+++ b/packages/common/utils.ts
@@ -1,3 +1,5 @@
+import { isNumber, isPlainObject } from './validator';
+
 export function isDef(value: any): boolean {
   return value !== undefined && value !== null;
 }
@@ -7,10 +9,6 @@ export function isObj(x: any): boolean {
   return x !== null && (type === 'object' || type === 'function');
 }
 
-export function isNumber(value) {
-  return /^\d+(\.\d+)?$/.test(value);
-}
-
 export function range(num: number, min: number, max: number) {
   return Math.min(Math.max(num, min), max);
 }
@@ -55,6 +53,20 @@ export function requestAnimationFrame(cb: Function) {
     });
 }
 
+export function pickExclude(obj: unknown, keys: string[]) {
+  if (!isPlainObject(obj)) {
+    return {};
+  }
+
+  return Object.keys(obj).reduce((prev, key) => {
+    if (!keys.includes(key)) {
+      prev[key] = obj[key];
+    }
+
+    return prev;
+  }, {});
+}
+
 export function getRect(
   this: WechatMiniprogram.Component.TrivialInstance,
   selector: string
diff --git a/packages/common/validator.ts b/packages/common/validator.ts
new file mode 100644
index 00000000..f7089750
--- /dev/null
+++ b/packages/common/validator.ts
@@ -0,0 +1,39 @@
+export function isFunction(val: unknown): val is Function {
+  return typeof val === 'function';
+}
+
+export function isPlainObject(val: unknown): val is Record<string, unknown> {
+  return val !== null && typeof val === 'object' && !Array.isArray(val);
+}
+
+export function isPromise<T = unknown>(val: unknown): val is Promise<T> {
+  return isPlainObject(val) && isFunction(val.then) && isFunction(val.catch);
+}
+
+export function isDef(value: any): boolean {
+  return value !== undefined && value !== null;
+}
+
+export function isObj(x: unknown): x is Record<string, unknown> {
+  const type = typeof x;
+  return x !== null && (type === 'object' || type === 'function');
+}
+
+export function isNumber(value: string) {
+  return /^\d+(\.\d+)?$/.test(value);
+}
+
+export function isBoolean(value: unknown): value is boolean {
+  return typeof value === 'boolean';
+}
+
+const IMAGE_REGEXP = /\.(jpeg|jpg|gif|png|svg|webp|jfif|bmp|dpg)/i;
+const VIDEO_REGEXP = /\.(mp4|mpg|mpeg|dat|asf|avi|rm|rmvb|mov|wmv|flv|mkv)/i;
+
+export function isImageUrl(url: string): boolean {
+  return IMAGE_REGEXP.test(url);
+}
+
+export function isVideoUrl(url: string): boolean {
+  return VIDEO_REGEXP.test(url);
+}
diff --git a/packages/uploader/README.md b/packages/uploader/README.md
index 6ba1f0df..3c03a98b 100644
--- a/packages/uploader/README.md
+++ b/packages/uploader/README.md
@@ -27,6 +27,7 @@ Page({
   data: {
     fileList: [],
   },
+
   afterRead(event) {
     const { file } = event.detail;
     // 当设置 mutiple 为 true 时, file 为数组格式，否则为对象格式
@@ -48,7 +49,7 @@ Page({
 
 ### 图片预览
 
-通过向组件传入`file-list`属性，可以绑定已经上传的图片列表，并展示图片列表的预览图
+通过向组件传入`file-list`属性，可以绑定已经上传的图片列表，并展示图片列表的预览图。file-list 的详细结构可见下方。
 
 ```html
 <van-uploader file-list="{{ fileList }}" />
@@ -58,10 +59,14 @@ Page({
 Page({
   data: {
     fileList: [
-      { url: 'https://img.yzcdn.cn/vant/leaf.jpg', name: '图片1' },
+      {
+        url: 'https://img.yzcdn.cn/vant/leaf.jpg',
+        name: '图片1',
+      },
       // Uploader 根据文件后缀来判断是否为图片文件
       // 如果图片 URL 中不包含类型信息，可以添加 isImage 标记来声明
       {
+        url: 'http://iph.href.lu?text=default',
         url: 'http://iph.href.lu/60x60?text=default',
         name: '图片2',
         isImage: true,
@@ -74,7 +79,7 @@ Page({
 
 ### 图片编辑状态
 
-通过`deletable `可以标识所有图片或者单张图片是否可删除。如果`Props `的全局`deletable `为`false`，则所有图片都不展示删除按钮；如果`Props `的全局`deletable `为`true`，则可通过设置每一个图片对象里的`deletable `来控制每一张图片是否显示删除按钮，如果图片对象里不设置则默认为`true`。
+通过`deletable`可以标识所有图片或者单张图片是否可删除。如果`Props`的全局`deletable`为`false`，则所有图片都不展示删除按钮；如果`Props`的全局`deletable`为`true`，则可通过设置每一个图片对象里的`deletable`来控制每一张图片是否显示删除按钮，如果图片对象里不设置则默认为`true`。
 
 ```html
 <van-uploader file-list="{{ fileList }}" deletable="{{ true }}" />
@@ -153,6 +158,7 @@ Page({
 ```html
 <van-uploader
   file-list="{{ fileList }}"
+  accept="media"
   use-before-read
   bind:before-read="beforeRead"
   bind:after-read="afterRead"
@@ -237,13 +243,26 @@ uploadFilePromise(fileName, chooseResult) {
 
 #### accept 的合法值
 
-| 参数    | 说明                           |
-| ------- | ------------------------------ |
-| `media` | 图片和视频                     |
-| `image` | 图片                           |
-| `video` | 视频                           |
-| `file`  | 除了图片和视频之外的其它的文件 |
-| `all`   | 所有文件                       |
+| 参数    | 说明                                 |
+| ------- | ------------------------------------ |
+| `media` | 图片和视频                           |
+| `image` | 图片                                 |
+| `video` | 视频                                 |
+| `file`  | 从客户端会话选择图片和视频以外的文件 |
+| `all`   | 从客户端会话选择所有文件             |
+
+### FileList
+
+`file-list` 为一个对象数组，数组中的每一个对象包含以下 `key`
+
+| 参数      | 说明                                                   |
+| --------- | ------------------------------------------------------ |
+| `url`     | 图片和视频的网络资源地址                               |
+| `name`    | 文件名称，视频将在全屏预览时作为标题显示               |
+| `thumb`   | 图片缩略图或视频封面的网络资源地址，仅对图片和视频有效 |
+| `type`    | 文件类型，可选值`image` `video` `file`                 |
+| `isImage` | 手动标记图片资源                                       |
+| `isVideo` | 手动标记视频资源                                       |
 
 ### Slot
 
diff --git a/packages/uploader/index.ts b/packages/uploader/index.ts
index a4a82350..7087da7d 100644
--- a/packages/uploader/index.ts
+++ b/packages/uploader/index.ts
@@ -1,6 +1,7 @@
 import { VantComponent } from '../common/component';
-import { isImageFile, isVideo, chooseFile, isPromise } from './utils';
+import { isImageFile, chooseFile, isVideoFile } from './utils';
 import { chooseImageProps, chooseVideoProps } from './shared';
+import { isBoolean, isPromise } from '../common/validator';
 
 VantComponent({
   props: {
@@ -73,13 +74,13 @@ VantComponent({
       const { fileList = [], maxCount } = this.data;
       const lists = fileList.map((item) => ({
         ...item,
-        isImage:
-          typeof item.isImage === 'undefined'
-            ? isImageFile(item)
-            : item.isImage,
-        deletable:
-          typeof item.deletable === 'undefined' ? true : item.deletable,
+        isImage: isImageFile(item),
+        isVideo: isVideoFile(item),
+        deletable: isBoolean(item.deletable) ? item.deletable : true,
       }));
+
+      console.log(lists);
+
       this.setData({ lists, isInCount: lists.length < maxCount });
     },
 
@@ -100,18 +101,9 @@ VantComponent({
         maxCount: maxCount - lists.length,
       })
         .then((res) => {
-          let file = null;
+          console.log(res);
 
-          if (isVideo(res, accept)) {
-            file = {
-              path: res.tempFilePath,
-              ...res,
-            };
-          } else {
-            file = multiple ? res.tempFiles : res.tempFiles[0];
-          }
-
-          this.onBeforeRead(file);
+          this.onBeforeRead(multiple ? res : res[0]);
         })
         .catch((error) => {
           this.$emit('error', error);
@@ -120,14 +112,14 @@ VantComponent({
 
     onBeforeRead(file) {
       const { beforeRead, useBeforeRead } = this.data;
-      let res: boolean | Promise<any> = true;
+      let res: boolean | Promise<void> = true;
 
       if (typeof beforeRead === 'function') {
         res = beforeRead(file, this.getDetail());
       }
 
       if (useBeforeRead) {
-        res = new Promise((resolve, reject) => {
+        res = new Promise<void>((resolve, reject) => {
           this.$emit('before-read', {
             file,
             ...this.getDetail(),
@@ -150,7 +142,7 @@ VantComponent({
     },
 
     onAfterRead(file) {
-      const { maxSize } = this.data;
+      const { maxSize, afterRead } = this.data;
       const oversize = Array.isArray(file)
         ? file.some((item) => item.size > maxSize)
         : file.size > maxSize;
@@ -160,8 +152,8 @@ VantComponent({
         return;
       }
 
-      if (typeof this.data.afterRead === 'function') {
-        this.data.afterRead(file, this.getDetail());
+      if (typeof afterRead === 'function') {
+        afterRead(file, this.getDetail());
       }
 
       this.$emit('after-read', { file, ...this.getDetail() });
@@ -184,32 +176,28 @@ VantComponent({
       const item = lists[index];
 
       wx.previewImage({
-        urls: lists
-          .filter((item) => item.isImage)
-          .map((item) => item.url || item.path),
-        current: item.url || item.path,
+        urls: lists.filter((item) => isImageFile(item)).map((item) => item.url),
+        current: item.url,
         fail() {
           wx.showToast({ title: '预览图片失败', icon: 'none' });
         },
       });
     },
-    // fix: accept 为 video 时不能展示视频
-    onPreviewVideo: function (event) {
+
+    onPreviewVideo(event) {
       if (!this.data.previewFullImage) return;
-      var index = event.currentTarget.dataset.index;
-      var lists = this.data.lists;
+      const { index } = event.currentTarget.dataset;
+      const { lists } = this.data;
+
       wx.previewMedia({
         sources: lists
-          .filter(function (item) {
-            return item.isVideo;
-          })
-          .map(function (item) {
-            item.type = 'video';
-            item.url = item.url || item.path;
-            return item;
-          }),
+          .filter((item) => isVideoFile(item))
+          .map((item) => ({
+            ...item,
+            type: 'video',
+          })),
         current: index,
-        fail: function () {
+        fail() {
           wx.showToast({ title: '预览视频失败', icon: 'none' });
         },
       });
diff --git a/packages/uploader/index.wxml b/packages/uploader/index.wxml
index c7ebf945..111e64c5 100644
--- a/packages/uploader/index.wxml
+++ b/packages/uploader/index.wxml
@@ -14,7 +14,7 @@
       <image
         wx:if="{{ item.isImage }}"
         mode="{{ imageFit }}"
-        src="{{ item.url || item.path }}"
+        src="{{ item.thumb || item.url }}"
         alt="{{ item.name || ('图片' + index) }}"
         class="van-uploader__preview-image"
         style="width: {{ utils.addUnit(previewSize) }}; height: {{ utils.addUnit(previewSize) }};"
@@ -23,21 +23,23 @@
       />
       <video
         wx:elif="{{ item.isVideo }}"
-        src="{{item.url || item.path}}"
-        autoplay="{{item.autoplay}}"
+        src="{{ item.url }}"
+        title="{{ item.name || ('视频' + index) }}"
+        poster="{{ item.thumb }}"
+        autoplay="{{ item.autoplay }}"
         class="van-uploader__preview-image"
         style="width: {{ utils.addUnit(previewSize) }}; height: {{ utils.addUnit(previewSize) }};"
         data-index="{{ index }}"
         bind:tap="onPreviewVideo"
       >
-      </video>      
+      </video>
       <view
         wx:else
         class="van-uploader__file"
         style="width: {{ utils.addUnit(previewSize) }}; height: {{ utils.addUnit(previewSize) }};"
       >
         <van-icon name="description" class="van-uploader__file-icon" />
-        <view class="van-uploader__file-name van-ellipsis">{{ item.name || item.url || item.path }}</view>
+        <view class="van-uploader__file-name van-ellipsis">{{ item.name || item.url }}</view>
       </view>
       <view
         wx:if="{{ item.status === 'uploading' || item.status === 'failed' }}"
@@ -59,7 +61,7 @@
 
     <!-- 上传样式 -->
     <block wx:if="{{ isInCount }}">
-      <view class="van-uploader__slot" bind:tap="startUpload">
+      <view class="van-uploader__slot" bindtap="startUpload">
         <slot />
       </view>
 
diff --git a/packages/uploader/utils.ts b/packages/uploader/utils.ts
index 47b8e052..2449286b 100644
--- a/packages/uploader/utils.ts
+++ b/packages/uploader/utils.ts
@@ -1,26 +1,24 @@
+import { pickExclude } from '../common/utils';
+import { isImageUrl, isVideoUrl } from '../common/validator';
+
 interface File {
-  path: string; // 上传临时地址
   url: string; // 上传临时地址
-  size: number; // 上传大小
-  name: string; // 上传文件名称，accept="image" 不存在
-  type: string; // 上传类型，accept="image" 不存在
-  time: number; // 上传时间，accept="image" 不存在
-  image: boolean; // 是否为图片
-}
-
-const IMAGE_REGEXP = /\.(jpeg|jpg|gif|png|svg|webp|jfif|bmp|dpg)/i;
-
-function isImageUrl(url: string): boolean {
-  return IMAGE_REGEXP.test(url);
+  size?: number; // 上传大小
+  name?: string;
+  type: string; // 上传类型
+  duration?: number; // 上传时间
+  time?: number; // 消息文件时间
+  isImage?: boolean;
+  isVideo?: boolean;
 }
 
 export function isImageFile(item: File): boolean {
-  if (item.type) {
-    return item.type.indexOf('image') === 0;
+  if (item.isImage != null) {
+    return item.isImage;
   }
 
-  if (item.path) {
-    return isImageUrl(item.path);
+  if (item.type) {
+    return item.type === 'image';
   }
 
   if (item.url) {
@@ -30,11 +28,62 @@ export function isImageFile(item: File): boolean {
   return false;
 }
 
-export function isVideo(
-  res: any,
-  accept: string
-): res is WechatMiniprogram.ChooseVideoSuccessCallbackResult {
-  return accept === 'video';
+export function isVideoFile(item: File): boolean {
+  if (item.isVideo != null) {
+    return item.isVideo;
+  }
+
+  if (item.type) {
+    return item.type === 'video';
+  }
+
+  if (item.url) {
+    return isVideoUrl(item.url);
+  }
+
+  return false;
+}
+
+function formatImage(
+  res: WechatMiniprogram.ChooseImageSuccessCallbackResult
+): File[] {
+  return res.tempFiles.map((item) => ({
+    ...pickExclude(item, ['path']),
+    type: 'image',
+    url: item.path,
+    thumb: item.path,
+  }));
+}
+
+function formatVideo(
+  res: WechatMiniprogram.ChooseVideoSuccessCallbackResult & Record<string, any>
+) {
+  return [
+    {
+      ...pickExclude(res, ['tempFilePath', 'thumbTempFilePath', 'errMsg']),
+      type: 'video',
+      url: res.tempFilePath,
+      thumb: res.thumbTempFilePath,
+    },
+  ];
+}
+
+function formatMedia(res: WechatMiniprogram.ChooseMediaSuccessCallbackResult) {
+  return res.tempFiles.map((item) => ({
+    ...pickExclude(item, ['fileType', 'thumbTempFilePath', 'tempFilePath']),
+    type: res.type,
+    url: item.tempFilePath,
+    thumb: res.type === 'video' ? item.thumbTempFilePath : item.tempFilePath,
+  }));
+}
+
+function formatFile(
+  res: WechatMiniprogram.ChooseMessageFileSuccessCallbackResult
+) {
+  return res.tempFiles.map((item) => ({
+    ...pickExclude(item, ['path']),
+    url: item.path,
+  }));
 }
 
 export function chooseFile({
@@ -46,66 +95,47 @@ export function chooseFile({
   sizeType,
   camera,
   maxCount,
-}): Promise<
-  | WechatMiniprogram.ChooseImageSuccessCallbackResult
-  | WechatMiniprogram.ChooseMediaSuccessCallbackResult
-  | WechatMiniprogram.ChooseVideoSuccessCallbackResult
-  | WechatMiniprogram.ChooseMessageFileSuccessCallbackResult
-> {
-  switch (accept) {
-    case 'image':
-      return new Promise((resolve, reject) => {
+}) {
+  return new Promise((resolve, reject) => {
+    switch (accept) {
+      case 'image':
         wx.chooseImage({
-          count: multiple ? Math.min(maxCount, 9) : 1, // 最多可以选择的数量，如果不支持多选则数量为1
-          sourceType: capture, // 选择图片的来源，相册还是相机
+          count: multiple ? Math.min(maxCount, 9) : 1,
+          sourceType: capture,
           sizeType,
-          success: resolve,
+          success: (res) => resolve(formatImage(res)),
           fail: reject,
         });
-      });
-    case 'media':
-      return new Promise((resolve, reject) => {
+        break;
+      case 'media':
         wx.chooseMedia({
-          count: multiple ? Math.min(maxCount, 9) : 1, // 最多可以选择的数量，如果不支持多选则数量为1
-          sourceType: capture, // 选择图片的来源，相册还是相机
+          count: multiple ? Math.min(maxCount, 9) : 1,
+          sourceType: capture,
           maxDuration,
           sizeType,
           camera,
-          success: resolve,
+          success: (res) => resolve(formatMedia(res)),
           fail: reject,
         });
-      });
-    case 'video':
-      return new Promise((resolve, reject) => {
+        break;
+      case 'video':
         wx.chooseVideo({
           sourceType: capture,
           compressed,
           maxDuration,
           camera,
-          success: resolve,
+          success: (res) => resolve(formatVideo(res)),
           fail: reject,
         });
-      });
-    default:
-      return new Promise((resolve, reject) => {
+        break;
+      default:
         wx.chooseMessageFile({
-          count: multiple ? maxCount : 1, // 最多可以选择的数量，如果不支持多选则数量为1
-          type: 'file',
-          success: resolve,
+          count: multiple ? maxCount : 1,
+          type: accept,
+          success: (res) => resolve(formatFile(res)),
           fail: reject,
         });
-      });
-  }
-}
-
-export function isFunction(val: unknown): val is Function {
-  return typeof val === 'function';
-}
-
-export function isObject(val: any): val is Record<any, any> {
-  return val !== null && typeof val === 'object';
-}
-
-export function isPromise<T = any>(val: unknown): val is Promise<T> {
-  return isObject(val) && isFunction(val.then) && isFunction(val.catch);
+        break;
+    }
+  });
 }