a-form绑定:model=“formobj”
a-form-item外面的template循环v-for=“(item, index) in formobj.formlist”
a-form-item的:name=“[‘formlist’, index, ‘settingMin’]”
a-input-number绑定对应值v-model:value=“item.settingMin”
每个字段校验自身的方法跟平时写法一样，在当前规则中触发其他字段的校验方法：
settingForm.value.validateFields([name])
其中name为a-form-item绑定的name：[‘formlist’, index, ‘settingMin’]
官方文档中的说明：

代码如下：
在当前字段可绑定@change去触发，也可以在当前validator的方法中触发另一个(注释中)

<template>
  <div class="hello">
    左边要小于右边， 改变左边，左边校验，同时触发右边的校验
    <a-form size="small" ref="settingForm" :model="formobj">
      <template v-for="(item, index) in formobj.formlist" :key="index">
        <a-form-item
          class="lowDivide"
          label="低-中分界线"
          :name="['formlist', index, 'settingMin']"
          :rules="rules1"
          :wrapperCol="{ span: 24 }"
        >
          <a-input-number
            size="small"
            :min="0"
            :max="100"
            :step="1"
            :precision="0"
            style="width: 40px"
            @change="changeValidate(['formlist', index, 'settingMax'])"
            v-model:value="item.settingMin"
          />
          %
        </a-form-item>
        <a-form-item
          class="highDivide"
          label="中-高分界线"
          :name="['formlist', index, 'settingMax']"
          :rules="rules2"
        >
          <a-input-number
            size="small"
            :min="0"
            :max="100"
            :step="1"
            :precision="0"
            @change="changeValidate(['formlist', index, 'settingMin'])"
            style="width: 40px"
            v-model:value="item.settingMax"
          />
          %
        </a-form-item>
        <a-divider></a-divider>
      </template>
    </a-form>
  </div>
</template>

<script setup>
import { onMounted, reactive, ref } from "vue";
import axios from "axios";
const settingForm = ref();
const formobj = reactive({
  formlist: [],
});
let validateMin = async (_rule, value) => {
  if (!value && value !== 0) {
    return Promise.reject("请填写");
  } else {
    if (
      formobj.formlist[_rule.field.split(".")[1]].settingMax ||
      formobj.formlist[_rule.field.split(".")[1]].settingMax === 0
    ) {
       自定义校验同一行另一个formItem
      //settingForm.value.validateFields(
      即用[]包裹住命名的name
      //  [["formlist",Number(_rule.field.split(".")[1]),"settingMax"]]
      //);
      if (value >= formobj.formlist[_rule.field.split(".")[1]].settingMax) {
        return Promise.reject(
          "需<" + formobj.formlist[_rule.field.split(".")[1]].settingMax
        );
      }
    } else return Promise.resolve();
    return Promise.resolve();
  }
};
let validateMax = async (_rule, value) => {
  if (!value && value !== 0) {
    return Promise.reject("请填写");
  } else {
    if (
      formobj.formlist[_rule.field.split(".")[1]].settingMin ||
      formobj.formlist[_rule.field.split(".")[1]].settingMin === 0
    ) {
       自定义校验同一行另一个formItem
      //settingForm.value.validateFields(
      即用[]包裹住命名的name
      //  [["formlist",Number(_rule.field.split(".")[1]),"settingMin"]]
      //);
      if (value <= formobj.formlist[_rule.field.split(".")[1]].settingMin) {
        return Promise.reject(
          "需>" + formobj.formlist[_rule.field.split(".")[1]].settingMin
        );
      } else {
        return Promise.resolve();
      }
    } else return Promise.resolve();
  }
};
const rules1 = [
  { required: true, type: "number", validator: validateMin, trigger: "change" },
];
const rules2 = [
  { required: true, type: "number", validator: validateMax, trigger: "change" },
];
const getList = async () => {
  let res = await axios.get("/formdata.json");
  if (res) {
    console.log("res", res);
    formobj.formlist = res.data.data;
  }
};
const changeValidate = (rule) => {
  console.log(rule);
  settingForm.value.validateFields([rule]);
};
onMounted(() => {
  getList();
});
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
:deep(.lowDivide) {
  display: inline-block;
  position: relative;
  top: 0;
  left: -90px;
}
:deep(.highDivide) {
  display: inline-block;
  position: relative;
  top: 0;
  right: -90px;
}
.ant-divider {
  margin-top: 0px;
}
.form-title::before {
  display: inline-block;
  margin-inline-end: 4px;
  color: #ff4d4f;
  font-size: 14px;
  font-family: SimSun, sans-serif;
  line-height: 1;
  content: "*";
}
:deep(.ant-form-item .ant-input-number-handler-wrap) {
  display: none;
}
</style>

界面效果如下图：