diff --git a/README.md b/README.md
index 5d27b48..07b1a4b 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,22 @@
 - 推荐使用GlideImage组件配合GlideOption参数来实现功能
 - 支持用户自定义配置实现能力参考GlideImage组件中对于入参GlideOption的处理
 
+## 下载
+
+1.配置npm仓库地址:@ohos:registry=https://repo.harmonyos.com/npm/
+
+2.命令行执行:
+
+​	npm install @ohos/imageknife
+
+DevEco Studio 下载:
+
+​	https://developer.harmonyos.com/cn/develop/deveco-studio
+
+## 使用说明
+
+[跳转至代码示例](##'代码示例')
+
 ## 目录
 
 ```
@@ -296,4 +312,20 @@ let requestOptin = new RequestOption();
 
 <img src="screenshot/g3.gif" width="50%"/>
 
-<img src="screenshot/g1.gif" width="50%"/><img src="screenshot/g2.gif" width="50%"/>
\ No newline at end of file
+<img src="screenshot/g1.gif" width="50%"/><img src="screenshot/g2.gif" width="50%"/>
+
+## 兼容性
+
+支持OpenHarmony API version 8 及以上版本
+
+## 开源协议
+
+[协议详见](https://gitee.com/openharmony-tpc/ImageKnife/blob/master/LICENSE)
+
+## 贡献代码
+
+使用过程中发现任何问题都可以提[issue](https://gitee.com/openharmony-tpc/ImageKnife/issues)给我们，当然，我们也非常欢迎你给我们发[PR](https://gitee.com/openharmony-tpc/ImageKnife/issues)
+
+## 遗留问题
+
+1.图片变换缓慢(待优化)
\ No newline at end of file
diff --git a/entry/src/main/ets/MainAbility/glide/networkmanage/DownloadClient.ets b/entry/src/main/ets/MainAbility/glide/networkmanage/DownloadClient.ets
index 37541eb..bbece3c 100644
--- a/entry/src/main/ets/MainAbility/glide/networkmanage/DownloadClient.ets
+++ b/entry/src/main/ets/MainAbility/glide/networkmanage/DownloadClient.ets
@@ -98,7 +98,7 @@ export class DownloadClient implements IDataFetch {
 
           })
 
-          loadTask.off('fail',(err)=>{
+          loadTask.on('fail',(err)=>{
             onErrorFunction('DownloadClient Download task fail err ='+err)
             if(loadTask) {
               loadTask.remove().then(result => {