如果想使用插槽，又不想添加都一个节点，那就把父组件的插槽的标签也改为slot

这样就可以了：如下

子组件：

<slot name="header">

</slot>

<slot slot="header">
  <el-form-item label="网点名称:" prop="rentingHouseName">
    <el-autocomplete
      class="inline-input"
      v-model="searchForm.rentingHouseName"
      :fetch-suggestions="querySearchRentingHouse"
      placeholder="输入关键字查询"
      :trigger-on-focus="false"
      @select="handleSelect">
    </el-autocomplete>
  </el-form-item>
  <el-form-item label="模糊字段:" prop="fuzzySearchKey">
    <el-input  v-model="searchForm.fuzzySearchKey" placeholder="模糊字段姓名或身份证等"></el-input>
  </el-form-item>
  <el-form-item label="有效时间:">
    <el-col :span="11">
      <el-form-item prop="startDate">
        <el-date-picker  type="datetime" placeholder="无限制" v-model="searchForm.startDate"  style="width: 100%;"></el-date-picker>
      </el-form-item>
    </el-col>
    <el-col class="line" :span="2" style="text-align: center;color: #ffffff;">-</el-col>
    <el-col :span="11">
      <el-form-item prop="validDate">
        <el-date-picker type="datetime"  placeholder="无限制"  v-model="searchForm.validDate"  style="width: 100%;"></el-date-picker>
      </el-form-item>
    </el-col>
  </el-form-item>
  <el-form-item label="开门方式:" prop="logType">
    <el-select  v-model="searchForm.logType" placeholder="全部">
      <el-option label="全部" value=""></el-option>
      <el-option v-for="item in logTypesList" :label="item.desc" :value="item.value"></el-option>
    </el-select>
  </el-form-item>
</slot>

这样解析出来的就只有四个<el-form-item></el-form-item>标签