参考elementUI官网以及网上的其他一些资料。话不多说，直接贴代码。 htmt部分：

html部分：

<el-form :model="environmentForm" ref="environmentForm">              
	<el-row :gutter="24" v-for="(item, index) in environmentForm.items" :key="item.key">
		<el-col :span="6">                 
			<el-form-item :prop="'items.' + index + '.name'" :rules="{required: true, message: '名称不能为空', trigger: 'blur'}">
				<el-input v-model="item.name"></el-input>
			</el-form-item>                  
		</el-col>              
		<el-col :span="6">                  
			<el-form-item :prop="'items.' + index + '.variable'" :rules="{required: true, message: '变量值不能为空', trigger: 'blur'}">
				<el-input v-model="item.variable"></el-input>
			</el-form-item>                  
		</el-col>
		<el-col :span="6">
			<el-form-item :prop="'items.' + index + '.description'" :rules="{required: true, message: '描述不能为空', trigger: 'blur'}">
				<el-input type="textarea" :rows="1" v-model="item.description"></el-input>
			</el-form-item>
		</el-col>
		<el-col :span="3" v-if="environmentForm.items.length !== 1">
			<i @click="removeEnvironmentForm(item)" style="font-size:28px;cursor:pointer;" class="el-icon-delete"></i>
		</el-col>
		<el-col :span="3" >
			<el-button @click="addEnvironmentForm" size="mini" class="el-icon-plus"></el-button>
		</el-col>
	</el-row>               

	<el-form-item>
		<el-button type="primary" @click="submitForm('environmentForm')">提交</el-button>                
		<el-button @click="resetForm('environmentForm')">重置</el-button>
	</el-form-item>
</el-form>

js部分：

<script>
export default {
	data () {
		return {
			environmentForm: {
				items: [{
					name: '',
					variable: '',
					description: ''
				}]
			}
		}
	},
	methods: {
		//提交事件
		submitForm(formName) {
			this.$refs[formName].validate((valid) => {
				if (valid) {
					console.log('提交',this.environmentForm);
					alert('submit!');
				} else {
					console.log('error submit!!');
					return false;
				}
			});
		},
		//重置事件
		resetForm(formName) {
			this.$refs[formName].resetFields();
		},
		//移除表单项事件
		removeEnvironmentForm(item) {   
			var index = this.environmentForm.items.indexOf(item)
			if (index !== -1) {
				this.environmentForm.items.splice(index, 1)
			}    
		},
		//添加表单项事件
		addEnvironmentForm() {
			this.environmentForm.items.push({
				name: '',
				variable: '',
				description: '',
				key: Date.now()
			});
		}
	}
}
</script>

实现效果如下，当只有一行时，删除按钮是隐藏的。