实现效果图：

代码如下：

<el-form-item
   label='菜单图标：'
   prop='icon'
  >
   <el-popover
     placement="bottom"
     width="450"
     trigger="click"
     @show="popoverShow"
   >
    <span slot="reference">
      <el-input suffix-icon='data-icon' v-model='form.icon' placeholder='请输入'>
       <template slot="append"><i :class="form.icon"/></template>
      </el-input>
    </span>
     <div class="iconList">
       <el-tabs v-model="activeName">
         <el-tab-pane
           v-for="(item, index) in iconList"
           :key="item.label"
           :name="'name'+ index"
           :label="item.label"
         >
           <i v-for="item in item.list" :key="item" :class="item" @click="setIcon(item)"
              style="font-size:20px"></i>
         </el-tab-pane>
       </el-tabs>
     </div>
   </el-popover>
 </el-form-item>
 data() {
	return {
		iconList: [
		  {
		    label: '通用图标',
		    id: 'first',
		    list: [
		      'iconfont iconicon_roundadd',
		      'iconfont iconicon_compile',
		      'iconfont iconicon_glass',
		      'iconfont iconicon_roundclose',
		      'iconfont iconicon_roundreduce',
		      'iconfont iconicon_delete',
		      'iconfont iconicon_shakehands',
		      'iconfont iconicon_task_done',
		      'iconfont iconicon_voipphone',
		      'iconfont iconicon_safety',
		      'iconfont iconicon_work',
		      'iconfont iconicon_study',
		      'iconfont iconicon_task',
		      'iconfont iconicon_subordinate',
		      'iconfont iconicon_star',
		      'iconfont iconicon_setting',
		      'iconfont iconicon_sms',
		      'iconfont iconicon_share',
		      'iconfont iconicon_secret',
		      'iconfont iconicon_scan_namecard',
		      'iconfont iconicon_principal',
		      'iconfont iconicon_group',
		      'iconfont iconicon_send',
		      'iconfont iconicon_scan',
		      'iconfont iconicon_search',
		      'iconfont iconicon_refresh',
		      'iconfont iconicon_savememo',
		      'iconfont iconicon_QRcode',
		      'iconfont iconicon_im_keyboard',
		      'iconfont iconicon_redpacket',
		      'iconfont iconicon_photo',
		      'iconfont iconicon_qq',
		      'iconfont iconicon_wechat',
		      'iconfont iconicon_phone',
		      'iconfont iconicon_namecard',
		      'iconfont iconicon_notice',
		      'iconfont iconicon_next_arrow',
		      'iconfont iconicon_left',
		      'iconfont iconicon_more',
		      'iconfont iconicon_details',
		      'iconfont iconicon_message',
		      'iconfont iconicon_mobilephone',
		      'iconfont iconicon_im_voice',
		      'iconfont iconicon_GPS',
		      'iconfont iconicon_ding',
		      'iconfont iconicon_exchange',
		      'iconfont iconicon_cspace',
		      'iconfont iconicon_doc',
		      'iconfont iconicon_dispose',
		      'iconfont iconicon_discovery',
		      'iconfont iconicon_community_line',
		      'iconfont iconicon_cloud_history',
		      'iconfont iconicon_coinpurse_line',
		      'iconfont iconicon_airplay',
		      'iconfont iconicon_at',
		      'iconfont iconicon_addressbook',
		      'iconfont iconicon_boss',
		      'iconfont iconicon_addperson',
		      'iconfont iconicon_affiliations_li',
		      'iconfont iconicon_addmessage',
		      'iconfont iconicon_addresslist',
		      'iconfont iconicon_add'
		    ]
		  },
		  {
		    label: '系统图标',
		    id: 'second',
		    list: [
		      'iconfont icon-zhongyingwen',
		      'iconfont icon-caidan',
		      'iconfont icon-rizhi1',
		      'iconfont icon-zhuti',
		      'iconfont icon-suoping',
		      'iconfont icon-bug',
		      'iconfont icon-qq1',
		      'iconfont icon-weixin1',
		      'iconfont icon-shouji',
		      'iconfont icon-mima',
		      'iconfont icon-yonghu',
		      'iconfont icon-yanzhengma',
		      'iconfont icon-canshu',
		      'iconfont icon-dongtai',
		      'iconfont icon-iconset0265',
		      'iconfont icon-shujuzhanshi2',
		      'iconfont icon-tuichuquanping',
		      'iconfont icon-rizhi',
		      'iconfont icon-cuowutishitubiao',
		      'iconfont icon-debug',
		      'iconfont icon-iconset0216',
		      'iconfont icon-quanxian',
		      'iconfont icon-quanxian',
		      'iconfont icon-shuaxin',
		      'iconfont icon-bofangqi-suoping',
		      'iconfont icon-quanping',
		      'iconfont icon-navicon',
		      'iconfont icon-biaodan',
		      'iconfont icon-liuliangyunpingtaitubiao08',
		      'iconfont icon-caidanguanli',
		      'iconfont icon-cuowu',
		      'iconfont icon-wxbgongju',
		      'iconfont icon-tuichu',
		      'iconfont icon-daohanglanmoshi02',
		      'iconfont icon-changyonglogo27',
		      'iconfont icon-biaoge',
		      'iconfont icon-baidu1',
		      'iconfont icon-tubiao',
		      'iconfont icon-souhu',
		      'iconfont icon-msnui-360',
		      'iconfont icon-iframe',
		      'iconfont icon-huanyingye'
		    ]
		  }
		]
	}
}
 // 方法
   /**
     * @description 图标弹窗框显示时触发
     * @author 饺子
    */
    popoverShow() {
      this.$nextTick(()=>{
        this.activeName = '0'
      })
    },
	 /**
     * @description 给icon绑定的点击事件
     * @author 饺子
     * @param { String } icon 图标
     */
    setIcon(icon) {
      this.$set(this.form, 'icon', icon)
    },
    
 // css
.icon_list {
  width: 100%;
  height: 320px;
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap; //一定要换行
  i {
    display: inline-block;
    width: 60px;
    height: 45px;
    color: #000000;
    font-size: 20px;
    border: 1px solid #E6E6E6;
    border-radius: 4px;
    cursor: pointer;
    text-align: center;
    line-height: 45px;
    margin: 5px;

    &:hover {
      color: blue;
      border-color: blue;
    }
  }

  ::v-deep .el-tabs__content {
    height: 270px;
    overflow-y: scroll; //y轴显示滚动条
    overflow-x: hidden; //x轴溢出隐藏
  }
}