diff --git a/.gitignore b/.gitignore
index fcce11f..0d057cb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,4 +35,5 @@ xcuserdata
 yarn.lock
 package-lock.json
 _ts2js
-es/
\ No newline at end of file
+es/
+.vscode
\ No newline at end of file
diff --git a/src/Cascader.tsx b/src/Cascader.tsx
index 2ade0a5..23bfb6a 100644
--- a/src/Cascader.tsx
+++ b/src/Cascader.tsx
@@ -36,11 +36,7 @@ class Cascader extends React.Component<ICascaderProps, any> {
       value[i] = data.value;
     }
     value.length = i;
-    if (!('value' in this.props)) {
-      this.setState({
-        value,
-      });
-    }
+    this.setState({ value });
     if (this.props.onChange) {
       this.props.onChange(value);
     }
diff --git a/tests/simple.spec.tsx b/tests/simple.spec.tsx
index fe43218..6d12630 100644
--- a/tests/simple.spec.tsx
+++ b/tests/simple.spec.tsx
@@ -45,4 +45,15 @@ describe('simple', () => {
       div);
     instance.onValueChange(['02', '02-2'], 1);
   });
+
+  it('test cascade effect', () => {
+
+    instance = ReactDOM.render(
+      <MCascader data={globalData} value={undefined} />,
+      div);
+
+    instance.onValueChange(['02', '01-1'], 0);
+
+    expect(instance.state.value).to.eql(['02', '02-1', '02-1-1']);
+  });
 });