diff --git a/components/radio/demo/radiogroup-more.md b/components/radio/demo/radiogroup-more.md
index 7d58053823..befcac97b4 100644
--- a/components/radio/demo/radiogroup-more.md
+++ b/components/radio/demo/radiogroup-more.md
@@ -37,10 +37,10 @@ const App = React.createClass({
     };
     return (
       <RadioGroup onChange={this.onChange} value={this.state.value}>
-        <Radio style={radioStyle} key="a" value={1}>Option A</Radio>
-        <Radio style={radioStyle} key="b" value={2}>Option B</Radio>
-        <Radio style={radioStyle} key="c" value={3}>Option C</Radio>
-        <Radio style={radioStyle} key="d" value={4}>
+        <Radio style={radioStyle} value={1}>Option A</Radio>
+        <Radio style={radioStyle} value={2}>Option B</Radio>
+        <Radio style={radioStyle} value={3}>Option C</Radio>
+        <Radio style={radioStyle} value={4}>
           More...
           {this.state.value === 4 ? <Input style={{ width: 100, marginLeft: 10 }} /> : null}
         </Radio>
diff --git a/components/radio/demo/radiogroup.md b/components/radio/demo/radiogroup.md
index 2c44833bb1..5b8a7457ab 100644
--- a/components/radio/demo/radiogroup.md
+++ b/components/radio/demo/radiogroup.md
@@ -32,10 +32,10 @@ const App = React.createClass({
   render() {
     return (
       <RadioGroup onChange={this.onChange} value={this.state.value}>
-        <Radio key="a" value={1}>A</Radio>
-        <Radio key="b" value={2}>B</Radio>
-        <Radio key="c" value={3}>C</Radio>
-        <Radio key="d" value={4}>D</Radio>
+        <Radio value={1}>A</Radio>
+        <Radio value={2}>B</Radio>
+        <Radio value={3}>C</Radio>
+        <Radio value={4}>D</Radio>
       </RadioGroup>
     );
   },
diff --git a/components/radio/group.tsx b/components/radio/group.tsx
index d5d784a870..826aa087c1 100644
--- a/components/radio/group.tsx
+++ b/components/radio/group.tsx
@@ -84,11 +84,7 @@ export default class RadioGroup extends React.Component<RadioGroupProps, any> {
     const props = this.props;
     const children = !props.children ? [] : React.Children.map(props.children, (radio: any) => {
       if (radio && (radio.type === Radio || radio.type === RadioButton) && radio.props) {
-        const keyProps = {};
-        if (!('key' in radio) && typeof radio.props.value === 'string') {
-          (keyProps as any).key = radio.props.value;
-        }
-        return React.cloneElement(radio, assign({}, keyProps, radio.props, {
+        return React.cloneElement(radio, assign({}, radio.props, {
           onChange: this.onRadioChange,
           checked: this.state.value === radio.props.value,
           disabled: radio.props.disabled || this.props.disabled,