diff --git a/src/stepper/index.js b/src/stepper/index.js
index e06b13940..e7ab49f78 100644
--- a/src/stepper/index.js
+++ b/src/stepper/index.js
@@ -2,6 +2,7 @@ import { createNamespace, isDef, addUnit } from '../utils';
 import { resetScroll } from '../utils/dom/reset-scroll';
 import { preventDefault } from '../utils/dom/event';
 import { formatNumber } from '../utils/format/number';
+import { isNaN } from '../utils/validate/number';
 import { FieldMixin } from '../mixins/field';
 
 const [createComponent, bem] = createNamespace('stepper');
@@ -153,6 +154,7 @@ export default createComponent({
 
       // format range
       value = value === '' ? 0 : +value;
+      value = isNaN(value) ? this.min : value;
       value = Math.max(Math.min(this.max, value), this.min);
 
       // format decimal
@@ -210,7 +212,6 @@ export default createComponent({
       this.$emit('focus', event);
 
       // readonly not work in lagacy mobile safari
-      /* istanbul ignore if */
       if (this.disableInput && this.$refs.input) {
         this.$refs.input.blur();
       }
diff --git a/src/stepper/test/index.spec.js b/src/stepper/test/index.spec.js
index 29b4cdef7..0a555e943 100644
--- a/src/stepper/test/index.spec.js
+++ b/src/stepper/test/index.spec.js
@@ -157,11 +157,30 @@ test('only allow interger', () => {
   expect(wrapper.emitted('input')[1][0]).toEqual(1);
 });
 
+test('input invalid value and blur', () => {
+  const wrapper = mount(Stepper, {
+    propsData: {
+      value: '',
+    },
+  });
+
+  const input = wrapper.find('input');
+  input.element.value = '.';
+  input.trigger('input');
+  input.trigger('blur');
+
+  expect(wrapper.emitted('input').pop()).toEqual([1]);
+});
+
 test('stepper focus', () => {
   const wrapper = mount(Stepper);
   const input = wrapper.find('input');
   input.trigger('focus');
   expect(wrapper.emitted('focus')).toBeTruthy();
+
+  wrapper.setProps({ disableInput: true });
+  input.trigger('focus');
+  expect(wrapper.emitted('blur')).toBeTruthy();
 });
 
 test('stepper blur', () => {