例如 

 <el-table:data="tableData":header-cell-style="headClass" style="width: 100%;" border ><el-table-columnprop="address"label="生产工序"align="center"></el-table-column>
//重点看这里<el-table-columnalign="center"><template slot="header" slot-scope="slot"><div>方数㎡</div><div class="greyColor">工件展开面积</div></template><template slot-scope="scope"><span>{{ scope.row.toolName }}</span></template></el-table-column><el-table-columnprop="address"label="子单数"align="center"></el-table-column><el-table-columnprop="address"label="工件数"align="center"></el-table-column></el-table>