<el-tabs v-model="groupId" @tab-click="handleClick">
              <el-tab-pane label="全部" name="0"></el-tab-pane>
              <el-tab-pane  v-for="items in editableTabs" :key="items.group_id" 
                   :name="items.id">
                  <el-tooltip  popper-class="el-popover el-popper" effect="light"  
                    placement="bottom" slot="label">
                      <div slot="content">
                        <el-tree  v-if="items.childTreeList != null"
                                  :data="items.childTreeList" 
                                  :props="{value: 'id',label: 'group_name', children: 'childTreeList',}" 
                                  @node-click="handleTreeClick"
                                  :default-expand-all="true"
                                  ></el-tree>

                      </div>
                      <span>{{ items.group_name }}</span>
                    </el-tooltip>
              </el-tab-pane>
            
          </el-tabs>

//切换体系
    handleClick(tab){
       this.groupId =tab.name;
       this.search();
    },
    //切换体系树下的分类
    handleTreeClick(node){
      this.groupId =node.id;
      this.search();
    },

这里主要是在el-tab-pane中的label属性不给赋值，单独写在el-tooltip中，使用span去写当前的名称，就可以实现鼠标放上去，浮现树的效果。