ElementUI表格el-table自适应高度（表头表尾固定不动），内容只在中间滚动，效果如图：

实现代码

<div class="mt-10" :style="{'height':tableHeight}">
      <div class="operation-bar">
        <el-button :icon="Plus" @click="allSave()" v-if="isEdit == 1">保存</el-button>
        <el-button @click="exportTable()">导出Excel</el-button>
      </div>
			<el-table :data="data" border style="width: 100%;font-size: 12px;height:90%;" v-loading="loading" @cell-click="cellClick" :cell-class-name="AddClass">
				<el-table-column  type="index" width="40" label="序号" fixed="left"></el-table-column>
				<el-table-column prop="SalaryMonth" label="发放年月" width="95" fixed="left"></el-table-column>
				<el-table-column prop="Departmentname" label="部门" width="150" fixed="left"></el-table-column>
				<el-table-column prop="WorkCompanyName" label="劳务公司" width="150" fixed="left"></el-table-column>
				<el-table-column prop="UserName" label="姓名" width="80" fixed="left"></el-table-column>
				<el-table-column prop="CertificateName" label="员工编号" width="80" fixed="left"></el-table-column>
				<el-table-column prop="PostTitle" label="证件号码" width="170" fixed="left"></el-table-column>
        <el-table-column :prop="FillSetID" :label="item.FillSetName" width="100" v-for="(item ,i) in setdata" align="center">
          <template #default="scope">
            <el-input
                v-model="scope.row[item.FillSetID]"
                @blur="removeClass(scope.row[item.FillSetID], scope.$index, scope.row)"
                type="number"
                v-if="isEdit == 1"/>
            <span >{{ scope.row[item.FillSetID] }}</span>
          </template>
        </el-table-column>
				<el-table-column label="备注">
          <template #default="scope">
            <el-input
                v-model="scope.row.Remark"
                @blur="removeClass(scope.row.Remark, scope.$index, scope.row)"
                type="text"
                v-if="isEdit == 1"/>
            <span >{{ scope.row.Remark }}</span>
          </template>
        </el-table-column>
			</el-table>
			<el-pagination background layout="total, prev, pager, next, jumper, sizes" :total="total" v-model:current-page="page" v-model:page-size="pageSize" class="pagination" @current-change="pageChange" />
		</div>

使用JS动态获取窗口高度

data(){
 return{
  tableHeight: window.innerHeight + 'px'
 }
}

<div class="mt-10" :style="{'height':tableHeight}"> vue绑定变量

需要给el-table  加上高度样式 

<el-table :data="data" border style="width: 100%;font-size: 12px;height:90%;"