SOURCE

new Vue({
  el: '#app',
  data() {
    return {
     yearData: {
    "2018":[{
        "month": "2月",
        "xmljcz":"ds",
        "xmljsr":"Ada",
        "xmljysk":"asfd",
        "bnljsr":"asdf",
        "bnljscjyzjz":"afd",
        "bnljcz":"Asd",
        "bnljysk":"As",
        "bnljjyyjsy":"tr",
    },{
        "month": "3月",
        "xmljcz":"ds",
        "xmljsr":"Ada",
        "xmljysk":"asfd",
        "bnljsr":"asdf",
        "bnljscjyzjz":"afd",
        "bnljcz":"Asd",
        "bnljysk":"As",
        "bnljjyyjsy":"tr",
    }],

    "2019":[{
        "month": "4月",
        "xmljcz":"ds",
        "xmljsr":"Ada",
        "xmljysk":"asfd",
        "bnljsr":"asdf",
        "bnljscjyzjz":"afd",
        "bnljcz":"Asd",
        "bnljysk":"As",
        "bnljjyyjsy":"tr",
    },{
        "month": "5月",
        "xmljcz":"ds",
        "xmljsr":"Ada",
        "xmljysk":"asfd",
        "bnljsr":"asdf",
        "bnljscjyzjz":"afd",
        "bnljcz":"Asd",
        "bnljysk":"As",
        "bnljjyyjsy":"tr",
    }]
},
    }
  },
  methods: {
    deleteRow(index, rows,year) {
      let arr = JSON.parse(JSON.stringify(rows));
        arr.splice(index, 1);
				this.$set(this.yearData,year,arr);

      }
  }
})

<!-- 引入样式 -->
<link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
<!-- 引入组件库 -->
<script src="https://unpkg.com/element-ui/lib/index.js">
</script>
<div id="app">
 <template>
   <div v-for="(data,year) in yearData">
     <h3>{{year}}</h3>
  <el-table
    :data="data"
    style="width: 100%"
    max-height="250">
    <el-table-column
      fixed
      prop="month"
      label="月份"
    >
    </el-table-column>
    <el-table-column
      fixed="right"
      label="操作"
     >
      <template slot-scope="scope">
        <el-button
          @click.native.prevent="deleteRow(scope.$index,data,year)"
          type="text"
          size="small">
          移除
        </el-button>
      </template>
    </el-table-column>
  </el-table>
     </div>
</template>
</div>