如下图：

对el-select加了如下的验证

 enterpriseType: [
  		 	{ required: true, message: "企业类型不能为空", trigger: "blur"}
 ],

再选择之后 提示message依然不消失

找了很多，最后发现就是一个很简单的设置问题
把rules里的这条改成：

   enterpriseType: [
  				{ required: true, message: "企业类型不能为空", trigger: ["blur",'change'] }
 	],

加一个change之后，就起作用了，所以，还是要老老实实看文档

<el-form ref="form" :model="form" label-width="200px" :rules="rules">
    <el-form-item label="企业类型" prop="enterpriseType">
         <el-select :poper-append-to-body="false" v-model="form.enterpriseType" clearable placeholder="请选择">
            <el-option  v-for="item in enterpriseType"
                 :key="item.value"
                 :label="item.label"
                 :value="item.value">
             </el-option>
          </el-select>
     </el-form-item>
     <el-form-item label="行业类型" prop="industryCategory">
	      <el-select v-model="form.industryCategory" clearable placeholder="请选择">
	          <el-option
	              v-for="item in industryCategory"
	              :key="item.value"
	              :label="item.label"
	              :value="item.value"
	          ></el-option>
	      </el-select>
       </el-form-item>
       <el-form-item label="营业范围" prop="businessScope">
      	  <el-input type="textarea" v-model="form.businessScope"></el-input>
        </el-form-item>
      <el-form-item label="营业执照扫描件" prop="businessLicenseScan">
	       <el-upload
		       :action="uploadUrl"
		       :before-upload="beforeAvatarUpload"
		       list-type="picture-card"
		       :on-preview="handlePictureCardPreview"
		       :on-remove="handleRemove"
		       :on-success="uploadSuccess"
		       accept="image/png,image/jpg,image/jpeg"
		       :limit="1">
           		<i class="el-icon-plus"></i>
         	    <div slot="tip" class="el-upload__tip" >只能上传1张</div>
            </el-upload>
	       <el-dialog :visible.sync="dialogVisible">
	           <img width="100%" :src="dialogImageUrl" alt>
	       </el-dialog>
  		 </el-form-item>
   		<el-form-item label="所在园区" prop="park">
	       <el-select v-model="form.park" clearable placeholder="请选择">
	           <el-option  v-for="item in park"
	               :key="item.value"
	               :label="item.label"
	               :value="item.value">
	            </el-option>
	       </el-select>
   		</el-form-item>
</el-form>

rules: {
    enterpriseType: [
        { required: true, message: "企业类型不能为空", trigger: ["blur",'change'] }
    ],
    industryCategory: [
        { required: true, message: "行业类型不能为空", trigger: ["blur",'change'] }
    ],
    park: [
        { required: true, message: "所在园区不能为空", trigger: ["blur",'change'] }
    ],
    businessLicenseScan: [
        { required: true, message: "营业执照必须上传，且必须是jpg/png/jpeg类型", trigger: ["blur",'change'] }
    ]
},