diff --git a/examples/routers/input-number.vue b/examples/routers/input-number.vue
index d228c31f..e14e3d77 100644
--- a/examples/routers/input-number.vue
+++ b/examples/routers/input-number.vue
@@ -6,7 +6,7 @@
         <!--<div @click="changeMax">change max</div>-->
         <!--<Input-number disabled :max="10" :min="1" :step="1.2" v-model="v2"></Input-number>-->
         <!--<Input-number :max="10" :min="1" v-model="obj.v"></Input-number>-->
-        {{ value1 }}
+        <InputNumber :max="10" :min="1" :step="1.2" v-model="value2"></InputNumber>
         <InputNumber :precision="1" :max="10" :min="1" :step="0.1" v-model="value1"></InputNumber>
     </div>
 </template>
@@ -22,7 +22,8 @@
                 obj: {
 
                 },
-                value1: 1.0
+                value1: 1.0,
+                value2: 1
             };
         },
         computed: {},
diff --git a/package.json b/package.json
index 7280ac39..f95753b1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "iview",
-  "version": "2.4.0-beta.2",
+  "version": "2.4.0-beta.3",
   "title": "iView",
   "description": "A high quality  UI components Library with Vue.js",
   "homepage": "http://www.iviewui.com",
diff --git a/src/components/input-number/input-number.vue b/src/components/input-number/input-number.vue
index 0bc13216..4ebe764c 100644
--- a/src/components/input-number/input-number.vue
+++ b/src/components/input-number/input-number.vue
@@ -161,7 +161,7 @@
             },
             precisionValue () {
                 // can not display 1.0
-                return this.currentValue.toFixed(this.precision);
+                return this.precision ? this.currentValue.toFixed(this.precision) : this.currentValue;
             }
         },
         methods: {
@@ -219,7 +219,9 @@
                 this.setValue(val);
             },
             setValue (val) {
-                val = Number(Number(val).toFixed(this.precision));
+                // 如果 step 是小数，且没有设置 precision，是有问题的
+                if (this.precision) val = Number(Number(val).toFixed(this.precision));
+
                 this.$nextTick(() => {
                     this.currentValue = val;
                     this.$emit('input', val);