diff --git a/components/config-provider/index.en-US.md b/components/config-provider/index.en-US.md
index 7c79bebe39..4adc52e58f 100644
--- a/components/config-provider/index.en-US.md
+++ b/components/config-provider/index.en-US.md
@@ -47,7 +47,7 @@ Some components use dynamic style to support wave effect. You can config `csp` p
 | getPopupContainer | To set the container of the popup element. The default is to create a `div` element in `body` | function(triggerNode) | () => document.body |  |
 | getTargetContainer | Config Affix, Anchor scroll target container | () => HTMLElement | () => window | 4.2.0 |
 | locale | Language package setting, you can find the packages in [antd/es/locale](http://unpkg.com/antd/es/locale/) | object | - |
-| prefixCls | Set prefix class. Note: This will discard default styles from `antd` | string | `ant` |  |
+| prefixCls | Set prefix className (cooperated with [@ant-prefix](https://github.com/ant-design/ant-design/blob/2c6c789e3a9356f96c47aea0083f5a15538315cf/components/style/themes/default.less#L7)) | string | `ant` |  |
 | pageHeader | Unify the ghost of PageHeader, ref [PageHeader](/components/page-header) | { ghost: boolean } | true |  |
 | direction | Set direction of layout. See [demo](#components-config-provider-demo-direction) | `ltr` \| `rtl` | `ltr` |  |
 | space | Set Space `size`, ref [Space](/components/space) | { size: `small` \| `middle` \| `large` \| `number` } | - | 4.1.0 |
diff --git a/components/config-provider/index.zh-CN.md b/components/config-provider/index.zh-CN.md
index 92d70a510d..4a4779afbe 100644
--- a/components/config-provider/index.zh-CN.md
+++ b/components/config-provider/index.zh-CN.md
@@ -48,7 +48,7 @@ export default () => (
 | getPopupContainer | 弹出框（Select, Tooltip, Menu 等等）渲染父节点，默认渲染到 body 上。 | function(triggerNode) | () => document.body |  |
 | getTargetContainer | 配置 Affix、Anchor 滚动监听容器。 | () => HTMLElement | () => window | 4.2.0 |
 | locale | 语言包配置，语言包可到 [antd/es/locale](http://unpkg.com/antd/es/locale/) 目录下寻找 | object | - |  |
-| prefixCls | 设置统一样式前缀。`注意：这将不会应用由 antd 提供的默认样式` | string | `ant` |  |
+| prefixCls | 设置统一样式前缀。`注意：需要配合 less 变量 [@ant-prefix](https://github.com/ant-design/ant-design/blob/2c6c789e3a9356f96c47aea0083f5a15538315cf/components/style/themes/default.less#L7) 使用` | string | `ant` |  |
 | pageHeader | 统一设置 PageHeader 的 ghost，参考 [PageHeader](/components/page-header) | { ghost: boolean } | true |  |
 | direction | 设置文本展示方向。 [示例](#components-config-provider-demo-direction) | `ltr` \| `rtl` | `ltr` |  |
 | space | 设置 Space 的 `size`，参考 [Space](/components/space) | { size: `small` \| `middle` \| `large` \| `number` } | - | 4.1.0 |