不难发现，需要多级表头的列只需要在外面包一层el-table-column起名字即可
<el-table :data="tableData" style="width: 100%"><el-table-column type="index" label="序号" width="100" align="center" /><el-table-column prop="orgName" label="热企名称" width="150" align="center" /><el-table-column prop="" label="总分" width="150" align="center" /><el-table-column label="经营许可" align="center"><el-table-column prop="operationPermit" label="经营许可" width="150" align="center" /></el-table-column><el-table-column label="热源能力" align="center"><el-table-columnprop="heatSourceAbility1"label="具备备用热源"width="150"align="center"/><el-table-columnprop="heatSourceAbility2"label="热源热量满足需求"width="150"align="center"/></el-table-column><el-table-column label="经营场所" align="center"><el-table-columnprop="operationPlace1"label="固定经营场所"width="150"align="center"/><el-table-columnprop="operationPlace2"label="服务标准齐全"width="150"align="center"/></el-table-column></el-table>