直接上代码。

<el-table :data='tableData' >
...
...
 <el-table-column label="操作" align="center" width="140" >
         <template slot-scope="scope">
              <el-button type="text" @click="upMove(scope.$index,scope.row)">上移</el-button>
              <el-button type="text" @click="upDown(scope.$index,scope.row)">下移</el-button>
          </template>
</el-table-column>
</el-table>
 
export default{
　　methods:{　　　
    upMove(index, row) {
      if (index <= 0) {
        this.$message.error('不能继续向上移动')
      } else {
        const upData = this.tableData[index - 1]
        this.tableData.splice(index - 1, 1)
        this.tableData.splice(index, 0, upData)
      }
    },
    upDown(index, scope) {
      if (index === (this.tableData.length - 1)) {
        this.$message.error('不能继续向下移动')
      } else {
        const downData = this.tableData[index + 1]
        this.tableData.splice(index + 1, 1)
        this.tableData.splice(index, 0, downData)
      }
    }
　}
}