diff --git a/src/field/index.js b/src/field/index.js
index 965f84707..f3fd0d6e4 100644
--- a/src/field/index.js
+++ b/src/field/index.js
@@ -21,6 +21,7 @@ import {
   preventDefault,
   createNamespace,
 } from '../utils';
+import { runSyncRule } from './utils';
 
 // Composition
 import { useParent } from '@vant/use';
@@ -133,26 +134,6 @@ export default createComponent({
         resolve(returnVal);
       });
 
-    const isEmptyValue = (value) => {
-      if (Array.isArray(value)) {
-        return !value.length;
-      }
-      if (value === 0) {
-        return false;
-      }
-      return !value;
-    };
-
-    const runSyncRule = (value, rule) => {
-      if (rule.required && isEmptyValue(value)) {
-        return false;
-      }
-      if (rule.pattern && !rule.pattern.test(value)) {
-        return false;
-      }
-      return true;
-    };
-
     const getRuleMessage = (value, rule) => {
       const { message } = rule;
 
@@ -337,7 +318,6 @@ export default createComponent({
       if (isDef(props[key])) {
         return props[key];
       }
-
       if (form && isDef(form.props[key])) {
         return form.props[key];
       }
@@ -423,7 +403,6 @@ export default createComponent({
         ref: inputRef,
         name: props.name,
         rows: props.rows,
-        style: null,
         class: bem('control', inputAlign),
         value: props.modelValue,
         disabled: props.disabled,
diff --git a/src/field/utils.ts b/src/field/utils.ts
new file mode 100644
index 000000000..5796e1f90
--- /dev/null
+++ b/src/field/utils.ts
@@ -0,0 +1,30 @@
+export type FieldValidateTrigger = 'onSubmit' | 'onChange' | 'onBlur';
+
+export type FieldRule = {
+  pattern?: RegExp;
+  trigger?: FieldValidateTrigger;
+  message?: string | ((value: unknown, rule: FieldRule) => string);
+  required?: boolean;
+  validator?: (value: unknown, rule: FieldRule) => boolean | Promise<boolean>;
+  formatter?: (value: unknown, rule: FieldRule) => unknown;
+};
+
+function isEmptyValue(value: unknown) {
+  if (Array.isArray(value)) {
+    return !value.length;
+  }
+  if (value === 0) {
+    return false;
+  }
+  return !value;
+}
+
+export function runSyncRule(value: unknown, rule: FieldRule) {
+  if (rule.required && isEmptyValue(value)) {
+    return false;
+  }
+  if (rule.pattern && !rule.pattern.test(String(value))) {
+    return false;
+  }
+  return true;
+}
diff --git a/src/form/README.zh-CN.md b/src/form/README.zh-CN.md
index 5fe5485ab..78f299507 100644
--- a/src/form/README.zh-CN.md
+++ b/src/form/README.zh-CN.md
@@ -486,7 +486,7 @@ export default {
 | message `v2.5.3` | 错误提示文案 | _string \| (value, rule) => string_ |
 | validator `v2.5.3` | 通过函数进行校验 | _(value, rule) => boolean \| Promise_ |
 | pattern `v2.5.3` | 通过正则表达式进行校验 | _RegExp_ |
-| trigger `v2.5.2` | 本项规则的触发时机，可选值为`onChange`、`onBlur` | _string_ |
+| trigger `v2.5.2` | 本项规则的触发时机，可选值为 `onChange`、`onBlur` | _string_ |
 | formatter `v2.5.3` | 格式化函数，将表单项的值转换后进行校验 | _(value, rule) => any_ |
 
 ### validate-trigger  可选值