<el-form ref="formData" :model="formData" label-width="100px">
            <!--日期板块-->
            <el-form-item label="活动时间" style="margin-left:29px">
                <el-col :span="11">
                <el-date-picker 
                    type="date" placeholder="选择日期"
                    v-model="formData.date"
                    @defalutData="startDeafultDate"
                    :default-value="new Date()"
                ></el-date-picker>
                </el-col>
            </el-form-item>

2、js部分：

data(){
  return {
    formData:{
       date:''
    },
  }  
},
/**
 * 设置默认时间
 */
methods:{
	//默认显示当前日期的前一天
	getdatatime(){
	     const start = new Date();
	     this.formData.date= start.getTime()- 60 * 60 * 24* 1000 ;
	},
},
mounted(){
   	 let that = this;
     that.getdatatime()
}