步骤：
模板中配置列：
<el-table-column label="序号" width="70" align="center"><template slot-scope="scope"><div v-if="scope.$index == 0" /><div v-else>{{ (scope.$index) }}</div></template></el-table-column><el-table-column label="订单编号" width="130" align="center" prop="purchase_order_num"><template slot-scope="scope"><div v-if="scope.$index == 0"> 注意：判断是第一行插入输入框或下拉菜单等，根据需求做调整<el-input v-model="inputVal" size="small" placeholder="点击输入编号" /></div><div v-else>{{ (scope.row.purchase_order_num) }}</div></template></el-table-column><el-table-column label="自编号" width="130" align="center" prop="project_name"><template slot-scope="scope"><div v-if="scope.$index == 0"><el-input v-model="inputVal" size="small" placeholder="点击输自编号" /></div><div v-else>{{ (scope.row.project_name) }}</div></template></el-table-column>
js部分：
data() {return {inputVal: '',Data: []},
// 更新数据upData() {dataDetail.getAl(this.params).then(res => {res.unshift({}) //注意：这一步不能省，否则表格展示数据还是从第一行开始（相当于将第一行数据替换为空）this.Data = res})}
看效果：
