diff --git a/components/Input/Input.jsx b/components/Input/Input.jsx
index 60c996eda..6547da892 100644
--- a/components/Input/Input.jsx
+++ b/components/Input/Input.jsx
@@ -7,7 +7,7 @@ class Input extends PureComponent {
   constructor(props) {
     super(props);
     this.state = {
-      length: 0,
+      length: (props.value || props.defaultValue || '').length,
     };
     this.onInputChange = this.onInputChange.bind(this);
   }
diff --git a/examples/pages/InputPage.jsx b/examples/pages/InputPage.jsx
index 690a35cbb..e3fc39548 100644
--- a/examples/pages/InputPage.jsx
+++ b/examples/pages/InputPage.jsx
@@ -46,7 +46,7 @@ class Page extends Component {
               <Panel.Title>显示输入字数</Panel.Title>
             </Panel.Header>
             <Panel.Body>
-              <Cell><Input autosize showLength type="textarea" rows="4" maxLength="200" placeholder="摘要" /></Cell>
+              <Cell><Input autosize showLength type="textarea" rows="4" maxLength="200" placeholder="摘要" value="111" /></Cell>
             </Panel.Body>
           </Panel>