实现以上效果

el-table中有个属性   header-cell-style 属性：用来设置表头单元格的样式

代码如下：

<el-table class="state-table" :data="temHoleTableData"
          size="mini" style="width: 100%" height="100%" :header-cell-style="headerStyle">
  <el-table-column prop="project" label="内圈" align="center" width="75"/>
  <el-table-column prop="project" label="中圈" align="center" width="75"/>
  <el-table-column prop="project" label="外圈" align="center"/>
  <el-table-column prop="project" label="外圈" align="center"/>
  <el-table-column prop="project" label="外圈" align="center"/>
</el-table>

headerStyle({row, column, rowIndex, columnIndex}) {
  row[2].colSpan = 3 //第三列的表头占据3个单元格
  row[3].colSpan = 0
  row[4].colSpan = 0
  if (columnIndex === 3 || columnIndex === 4) {
    return 'display: none'
  }
}