="select"

select(rows,) {
   // true为选中, 0或false为取消选中
   this.selected = rows.length && rows.indexOf(row) !== -1;
 },

<template>
  <div class="mainBox">
    <el-table ref="multipleTable" :data="tableData" @select="select">
      <el-table-column type="selection" width="55" align="center">
      </el-table-column>
      <el-table-column prop="name" label="姓名" align="center">
      </el-table-column>
      <el-table-column prop="age" label="年龄" align="center">
      </el-table-column>
    </el-table>
    <p v-if="selected !== null">
      当前操作为：{{ selected ? "选中行" : "取消选中" }}
    </p>
  </div>
</template>
<script>export default {
  data() {
    return {
      selected: null,
      tableData: [
        {
          name: "王小虎",
          age: 10,
        },
        {
          name: "张三",
          age: 20,
        },
        {
          name: "李四",
          age: 30,
        },
      ],
    };
  },
  methods: {
    select(rows,) {
      // true为选中, 0或false为取消选中
      this.selected = rows.length && rows.indexOf(row) !== -1;
    },
  },
};</script>
<style  scoped>.mainBox {
  margin: 30px;
}</style>