diff --git a/components/vehicle-keyboard/index.js b/components/vehicle-keyboard/index.js
index dee965b..243d459 100644
--- a/components/vehicle-keyboard/index.js
+++ b/components/vehicle-keyboard/index.js
@@ -29,12 +29,14 @@ Component({
       },
     methods: {
         show: function (number, type) {
+            var index = 0
             if(number && number.length){
                this.data.plateNumber = number.split('')
+               index = this.data.plateNumber.length - 1
             }
             this.data.type = type
             this.updateNumber()
-            this.setData({ plateNumber: this.data.plateNumber, mode: 1, activeIndex: 0, visible: true})
+            this.setData({ plateNumber: this.data.plateNumber, mode: 1, activeIndex: index, visible: true})
         },
         hide: function () {
           this.setData({visible: false, plateNumber: ["", "", "", "", "", "", ""]})
diff --git a/components/vehicle-keyboard/index.wxml b/components/vehicle-keyboard/index.wxml
index c78dbd8..2a03bf6 100644
--- a/components/vehicle-keyboard/index.wxml
+++ b/components/vehicle-keyboard/index.wxml
@@ -16,11 +16,11 @@
                 {{item}}</view>
         </view>
         <view class="kb-keyboard-nums flex-brick" hidden="{{!(mode==2)}}">
-            <view class="kb-keyboard_td {{activeIndex==1 ? 'disabled':''}}" wx:for="{{numbers}}" bindtap="tapKeyboard"
+            <view class="kb-keyboard_td {{activeIndex == 1 ? 'disabled' : '' }}" wx:for="{{numbers}}" bindtap="tapKeyboard"
                 data-val="{{item}}" wx:key="index">{{item}}</view>
         </view>
         <view class="kb-keyboard-letters flex-brick" hidden="{{!(mode==2)}}">
-            <view class="kb-keyboard_td {{activeIndex > 1 && item =='Q' ? 'disabled':''}}" wx:for="{{letters}}"
+            <view class="kb-keyboard_td {{activeIndex < 1 ? 'disabled' : '' }}" wx:for="{{letters}}"
                 bindtap="tapKeyboard" data-val="{{item}}" wx:key="index">{{item}}</view>
         </view>