首先给下拉框设置类名，即popper-class属性，并且给el-option增加title属性

<el-selectv-model="item.portrayalItem"v-loadmore="{ method: lazyItemList, item, index }"multiplefilterableremotepopper-class="dropDown-select"><el-optionv-for="i in item.selectList":key="i.LabelID":label="i.LabelName":title="i.LabelName":value="i.LabelID"></el-option></el-select>

然后设置样式，注意要新开一个style标签

<style lang="scss">
.dropDown-select{width: 0;
}
</style>