diff --git a/packages/nutui/components/textarea/index.ts b/packages/nutui/components/textarea/index.ts
index 78f0f959..b73e08b3 100644
--- a/packages/nutui/components/textarea/index.ts
+++ b/packages/nutui/components/textarea/index.ts
@@ -1 +1,2 @@
 export * from './textarea'
+export * from './type'
diff --git a/packages/nutui/components/textarea/textarea.ts b/packages/nutui/components/textarea/textarea.ts
index 25c6cd27..a366bc02 100644
--- a/packages/nutui/components/textarea/textarea.ts
+++ b/packages/nutui/components/textarea/textarea.ts
@@ -2,7 +2,7 @@ import type { ExtractPropTypes, PropType } from 'vue'
 import { commonProps, isString, makeNumberProp, makeStringProp, truthProp } from '../_utils'
 import { BLUR_EVENT, CHANGE_EVENT, CONFIRM_EVENT, FOCUS_EVENT, UPDATE_MODEL_EVENT } from '../_constants'
 import type { InputAlignType } from '../input'
-import type { TextareaAdjustKeyboardTo, TextareaConfirmType } from './type'
+import type { TextareaAdjustKeyboardTo, TextareaAutosizeObject, TextareaConfirmType } from './type'
 
 export const textareaProps = {
   ...commonProps,
@@ -50,7 +50,7 @@ export const textareaProps = {
    * @description 是否自适应内容高度，也可传入对象
    */
   autosize: {
-    type: [Boolean, Object],
+    type: [Boolean, Object as PropType<TextareaAutosizeObject>],
     default: false,
   },
   /**
diff --git a/packages/nutui/components/textarea/textarea.vue b/packages/nutui/components/textarea/textarea.vue
index 86597115..b14eca39 100644
--- a/packages/nutui/components/textarea/textarea.vue
+++ b/packages/nutui/components/textarea/textarea.vue
@@ -1,4 +1,3 @@
-<!-- eslint-disable padded-blocks -->
 <script setup lang="ts">
 import type { CSSProperties } from 'vue'
 import type * as CSS from 'csstype'
@@ -8,12 +7,9 @@ import { getMainClass, isH5, isMpAlipay, pxCheck } from '../_utils'
 import { BLUR_EVENT, CHANGE_EVENT, CONFIRM_EVENT, FOCUS_EVENT, PREFIX, UPDATE_MODEL_EVENT } from '../_constants'
 import { useTranslate } from '../../locale'
 import { useFormDisabled } from '../form/form'
+import type { InputTarget } from '../input/type'
 import { textareaEmits, textareaProps } from './textarea'
 
-export interface InputTarget extends HTMLInputElement {
-  composing?: boolean
-}
-
 const props = defineProps(textareaProps)
 const emit = defineEmits(textareaEmits)
 const disabled = useFormDisabled(toRef(props, 'disabled'))
diff --git a/packages/nutui/components/textarea/type.ts b/packages/nutui/components/textarea/type.ts
index 2ac5d277..11a7e63e 100644
--- a/packages/nutui/components/textarea/type.ts
+++ b/packages/nutui/components/textarea/type.ts
@@ -1,3 +1,16 @@
-export type TextareaConfirmType = 'send' | 'search' | 'next' | 'go' | 'done' | 'return'
+export interface TextareaAutosizeObject {
+  /**
+   * 最大高度
+   */
+  maxHeight?: number | string
+  /**
+   * 最小高度
+   */
+  minHeight?: number | string
+}
 
-export type TextareaAdjustKeyboardTo = 'cursor' | 'bottom'
+export const textareaConfirmType = ['send', 'search', 'next', 'go', 'done', 'return'] as const
+export type TextareaConfirmType = (typeof textareaConfirmType)[number]
+
+export const textareaAdjustKeyboardTo = ['cursor', 'bottom']
+export type TextareaAdjustKeyboardTo = (typeof textareaAdjustKeyboardTo)[number]