diff --git a/package.json b/package.json
index 55ffaa5b..21b41512 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "rc-input-number",
-  "version": "3.0.0",
+  "version": "3.0.1",
   "description": "input-number ui component for react(web & react-native)",
   "keywords": [
     "react",
diff --git a/src/mixin.js b/src/mixin.js
index 3948076b..e3bf2f1f 100644
--- a/src/mixin.js
+++ b/src/mixin.js
@@ -100,7 +100,7 @@ export default {
 
   setValue(v, callback) {
     // trigger onChange
-    const newValue = isNaN(v) || v === '' ? undefined : v;
+    const newValue = isNaN(parseFloat(v, 10)) ? undefined : parseFloat(v, 10);
     const changed = newValue !== this.state.value;
     if (!('value' in this.props)) {
       this.setState({
diff --git a/tests/index.js b/tests/index.js
index 0bf373c8..6df7cf18 100644
--- a/tests/index.js
+++ b/tests/index.js
@@ -233,6 +233,16 @@ describe('inputNumber', () => {
       expect(onChangeFirstArgument).to.be(undefined);
     });
 
+    it('input invalid string with number', () => {
+      Simulate.focus(inputElement);
+      Simulate.change(inputElement, { target: { value: '2x' } });
+      expect(inputElement.value).to.be('2x');
+      expect(onChangeFirstArgument).to.be('2x');
+      Simulate.blur(inputElement);
+      expect(inputElement.value).to.be('2');
+      expect(onChangeFirstArgument).to.be(2);
+    });
+
     it('input negative symbol', () => {
       example.setState({ min: -100 });
       Simulate.focus(inputElement);