官方使用DEMO
            
            
              html
              
              
            
          
          <template>
  <el-select v-model="value" placeholder="请选择">
    <el-option
      v-for="item in options"
      :key="item.value"
      :label="item.label"
      :value="item.value">
    </el-option>
  </el-select>
</template>
<script>
  export default {
    data() {
      return {
        options: [{
          value: '选项1',
          label: '黄金糕'
        }, {
          value: '选项2',
          label: '双皮奶'
        }, {
          value: '选项3',
          label: '蚵仔煎'
        }, {
          value: '选项4',
          label: '龙须面'
        }, {
          value: '选项5',
          label: '北京烤鸭'
        }],
        value: ''
      }
    }
  }
</script>1.修改下拉框的宽度
:popper-append-to-body="false"

            
            
              html
              
              
            
          
          <template>
  <el-select v-model="value" placeholder="请选择">
    <el-option
      v-for="item in options"
      :popper-append-to-body="false"
      :key="item.value"
      :label="item.label"
      :value="item.value">
    </el-option>
  </el-select>
</template>2.下拉框筛选不显示某条数据
v-if="item.value !== form.id"
            
            
              javascript
              
              
            
          
          <el-option
	v-for="item in options"
	:key="item.value"
	:label="item.label"
	:value="item.value"
	v-if="item.value !== form.id"
>
</el-option>