diff --git a/docs/ext-storage/dev.md b/docs/ext-storage/dev.md
index 49cc98946cda4b35a7ce51b43852f86998b3e496..1c83bde024a7d206b205d426f40b667ecdad86fd 100644
--- a/docs/ext-storage/dev.md
+++ b/docs/ext-storage/dev.md
@@ -29,10 +29,12 @@ const extStorageManager = uniCloud.getExtStorageManager({
#### 请求参数@getextstoragemanager-params
-|参数名 |类型 |必填 |默认值 |说明 |
-|:-: |:-: |:-: |:-: |:- |
-|provider |String |是 |- |扩展存储供应商,可选
qiniu: 七牛云|
-|domain |String |是 |- |扩展储存域名(域名地址)如:example.com |
+|参数名 |类型 |必填 |默认值 |说明 |
+|:-: |:-: |:-: |:-: |:- |
+|provider |String |是 |- |必填,扩展存储供应商,可选
qiniu: 七牛云 |
+|domain |String |是 |- |必填,扩展储存域名(域名地址)如:example.com |
+|bucketName |String |否 |- |选填,扩展储存的bucket名称,不填会自动从绑定的空间中获取 |
+|bucketSecret |String |否 |- |选填,扩展储存的bucket密钥,不填会自动从绑定的空间中获取 |
### 获取前端上传参数@getuploadfileoptions