SOURCE

var Main = {
  data() {
    return {
      tableData: []
    }
  },
 methods: {
        checkMethod ({ row }) {
          return row.age > 26
        },
   age(){
     this.tableData[0].age = 29
   },
      age1(){
     this.tableData[4].age = 20
   }
   
      },
  created () {
    var list = []
    for(var index = 0; index < 20; index++){
      list.push({
        id: index + 10000,
        name: 'test' + index,
        role: 'developer',
        sex: 'Man',
        age: 24+index,
        time: 1556677810888 + index * 500,
        region: 'ShenZhen',
        address: 'address abc' + index
      })
    }
    this.tableData = list
  }
};
var Ctor = Vue.extend(Main);
new Ctor().$mount('#app')

<script src="https://cdn.jsdelivr.net/npm/vue"></script>
<script src="https://cdn.jsdelivr.net/npm/xe-utils"></script>
<script src="https://cdn.jsdelivr.net/npm/vxe-table"></script>
<!-- 使用 cdn 引用方式需要注意是否锁定版本，默认指向最新版本 -->

<div id="app">
  <template>
    <div>
  <vxe-toolbar>
          <template v-slot:buttons>
            <vxe-button @click="age()">设置第一行age 29</vxe-button> 
            <vxe-button @click="age1()">设置第5行age 20</vxe-button>

          </template>
        </vxe-toolbar>

        <vxe-table
          border
          highlight-hover-row
          class="checkbox-table"
          ref="xTable3"
          :data="tableData"
          :checkbox-config="{checkField: 'checked', trigger: 'row',checkMethod}"
                  >
          <vxe-table-column type="checkbox" width="60"></vxe-table-column>
          <vxe-table-column field="name" title="Name"></vxe-table-column>
          <vxe-table-column field="sex" title="Sex"></vxe-table-column>
          <vxe-table-column field="age" title="Age"></vxe-table-column>
          <vxe-table-column field="address" title="Address" show-overflow></vxe-table-column>
        </vxe-table>
      
</div>
  </template>

@import url("https://cdn.jsdelivr.net/npm/vxe-table/lib/index.css");