diff --git a/components/radio/demo/basic.ts b/components/radio/demo/basic.ts
index 136bc46d31..3f2b87afd4 100644
--- a/components/radio/demo/basic.ts
+++ b/components/radio/demo/basic.ts
@@ -3,7 +3,7 @@ import { Component } from '@angular/core';
 @Component({
   selector: 'nz-demo-radio-basic',
   template: `
-    <label nz-radio>Radio</label>
+    <label nz-radio ngModel>Radio</label>
   `
 })
 export class NzDemoRadioBasicComponent {}
diff --git a/components/radio/doc/index.en-US.md b/components/radio/doc/index.en-US.md
index f918e073c0..5cc198dbf7 100644
--- a/components/radio/doc/index.en-US.md
+++ b/components/radio/doc/index.en-US.md
@@ -48,6 +48,8 @@ radio group，wrap a group of `nz-radio`。
 
 ### [nz-radio]
 
+you can get `NzRadioComponent` via `ViewChild`
+
 | Name | Description |
 | ---- | ----------- |
 | blur() | remove focus |
diff --git a/components/radio/doc/index.zh-CN.md b/components/radio/doc/index.zh-CN.md
index 73ddecaaa5..0430d99fdf 100644
--- a/components/radio/doc/index.zh-CN.md
+++ b/components/radio/doc/index.zh-CN.md
@@ -50,6 +50,8 @@ import { NzRadioModule } from 'ng-zorro-antd';
 
 ### [nz-radio]
 
+可以通过 `ViewChild` 等其他方式获取 `NzRadioComponent` 使用以下方法
+
 | 名称 | 描述 |
 | --- | --- |
 | blur() | 移除焦点 |