diff --git a/packages/image-preview/ImagePreview.js b/packages/image-preview/ImagePreview.js
index cd947f7f4..2a40fcbde 100644
--- a/packages/image-preview/ImagePreview.js
+++ b/packages/image-preview/ImagePreview.js
@@ -165,7 +165,7 @@ export default sfc({
       this.startDistance = getDistance(event.touches);
     },
 
-    onTouchStart(event) {
+    onImageTouchStart(event) {
       const { touches } = event;
       const { offsetX = 0 } = this.$refs.swipe || {};
 
@@ -176,7 +176,7 @@ export default sfc({
       }
     },
 
-    onTouchMove(event) {
+    onImageTouchMove(event) {
       const { touches } = event;
       if (this.moving || this.zooming) {
         preventDefault(event, true);
@@ -197,7 +197,7 @@ export default sfc({
       }
     },
 
-    onTouchEnd(event) {
+    onImageTouchEnd(event) {
       /* istanbul ignore else */
       if (this.moving || this.zooming) {
         let stopPropagation = true;
@@ -268,10 +268,10 @@ export default sfc({
             class: bem('image'),
             style: index === active ? this.imageStyle : null,
             on: {
-              touchstart: this.onTouchStart,
-              touchmove: this.onTouchMove,
-              touchend: this.onTouchEnd,
-              touchcancel: this.onTouchEnd
+              touchstart: this.onImageTouchStart,
+              touchmove: this.onImageTouchMove,
+              touchend: this.onImageTouchEnd,
+              touchcancel: this.onImageTouchEnd
             }
           };
           return (
@@ -292,6 +292,7 @@ export default sfc({
         <div
           class={[bem(), this.className]}
           onTouchstart={this.onWrapperTouchStart}
+          onTouchMove={preventDefault}
           onTouchend={this.onWrapperTouchEnd}
           onTouchcancel={this.onWrapperTouchEnd}
         >
diff --git a/packages/uploader/zh-CN.md b/packages/uploader/zh-CN.md
index 204d3e3b6..1d8de0ed1 100644
--- a/packages/uploader/zh-CN.md
+++ b/packages/uploader/zh-CN.md
@@ -124,7 +124,7 @@ export default {
 | name | 标识符，可以在回调函数的第二项参数中获取 | `String` | - | 1.6.13 |
 | accept | 接受的文件类型 | `String` | `image/*` | - |
 | preview-image | 是否在上传完成后展示预览图 | `Boolean` | `true` | 2.0.0 |
-| preview-size | 预览图和上传区域的尺寸，单位为`px` | `String | Number` | `80px` | 2.0.0 |
+| preview-size | 预览图和上传区域的尺寸，默认单位为`px` | `String | Number` | `80px` | 2.0.0 |
 | multiple | 是否开启图片多选，部分安卓机型不支持 | `Boolean` | `false` | 2.0.0 |
 | disabled | 是否禁用文件上传 | `Boolean` | `false` | - |
 | capture | 图片选取模式，可选值为`camera`(直接调起摄像头) | `String` | - | 2.0.0 |