diff --git a/README.md b/README.md
index 26611bb..9b0f447 100644
--- a/README.md
+++ b/README.md
@@ -6,8 +6,8 @@
 
 ## install
 
- [npm 地址](https://www.npmjs.com/package/cos-nodejs-sdk-v5)
- 
+[npm 地址](https://www.npmjs.com/package/cos-nodejs-sdk-v5)
+
 ```
 npm i cos-nodejs-sdk-v5 --save
 ```
@@ -19,28 +19,32 @@ npm i cos-nodejs-sdk-v5 --save
 var COS = require('cos-nodejs-sdk-v5');
 // 创建实例
 var cos = new COS({
-    SecretId: 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
-    SecretKey: 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
+  SecretId: 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
+  SecretKey: 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
 });
 
 // 存储桶名称，由bucketname-appid 组成，appid必须填入，可以在COS控制台查看存储桶名称。 https://console.cloud.tencent.com/cos5/bucket
 var Bucket = 'test-1250000000';
-// 存储桶Region可以在COS控制台指定存储桶的概览页查看 https://console.cloud.tencent.com/cos5/bucket/ 
+// 存储桶Region可以在COS控制台指定存储桶的概览页查看 https://console.cloud.tencent.com/cos5/bucket/
 // 关于地域的详情见 https://cloud.tencent.com/document/product/436/6224
 var Region = 'ap-guangzhou';
 
-// 分片上传
-cos.sliceUploadFile({
+// 高级上传
+cos.uploadFile(
+  {
     Bucket: Bucket,
     Region: Region,
     Key: '1.zip',
-    FilePath: './1.zip' // 本地文件地址，需自行替换
-}, function (err, data) {
+    FilePath: './1.zip', // 本地文件地址，需自行替换
+    SliceSize: 1024 * 1024 * 5, // 触发分块上传的阈值，超过5MB使用分块上传，非必须
+  },
+  function (err, data) {
     console.log(err, data);
-});
+  }
+);
 ```
 
-## 说明文档 
+## 说明文档
 
 [使用例子](demo/demo.js)
 
diff --git a/package.json b/package.json
index 40bd140..6a03a09 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cos-nodejs-sdk-v5",
-  "version": "2.12.4",
+  "version": "2.12.5",
   "description": "cos nodejs sdk v5",
   "main": "index.js",
   "types": "index.d.ts",