diff --git a/.changeset/real-masks-glow.md b/.changeset/real-masks-glow.md
new file mode 100644
index 000000000..59c052718
--- /dev/null
+++ b/.changeset/real-masks-glow.md
@@ -0,0 +1,5 @@
+---
+"@hi-ui/check-tree-select": minor
+---
+
+feat: add size api
diff --git a/.changeset/wise-teachers-tease.md b/.changeset/wise-teachers-tease.md
new file mode 100644
index 000000000..ba7f06c59
--- /dev/null
+++ b/.changeset/wise-teachers-tease.md
@@ -0,0 +1,5 @@
+---
+"@hi-ui/hiui": patch
+---
+
+CheckTreeSelect feat: add size api
diff --git a/packages/ui/check-tree-select/src/CheckTreeSelect.tsx b/packages/ui/check-tree-select/src/CheckTreeSelect.tsx
index d9ea5fb66..309fca09b 100644
--- a/packages/ui/check-tree-select/src/CheckTreeSelect.tsx
+++ b/packages/ui/check-tree-select/src/CheckTreeSelect.tsx
@@ -17,7 +17,7 @@ import { uniqBy } from '@hi-ui/array-utils'
 import { Highlighter } from '@hi-ui/highlighter'
 import { TagInputMock, TagInputMockProps } from '@hi-ui/tag-input'
 import { UpOutlined, DownOutlined } from '@hi-ui/icons'
-import { useLocaleContext } from '@hi-ui/core'
+import { HiBaseSizeEnum, useLocaleContext } from '@hi-ui/core'
 import { callAllFuncs } from '@hi-ui/func-utils'
 import Checkbox from '@hi-ui/checkbox'
 // import { UseDataSource } from '@hi-ui/use-data-source'
@@ -89,6 +89,7 @@ export const CheckTreeSelect = forwardRef<HTMLDivElement | null, CheckTreeSelect
       height,
       showCheckAll,
       tagInputProps,
+      size = 'md',
       ...rest
     },
     ref
@@ -345,6 +346,7 @@ export const CheckTreeSelect = forwardRef<HTMLDivElement | null, CheckTreeSelect
         trigger={
           <TagInputMock
             {...tagInputProps}
+            size={size}
             // ref={targetElementRef}
             // onClick={openMenu}
             // disabled={disabled}
@@ -370,6 +372,7 @@ export const CheckTreeSelect = forwardRef<HTMLDivElement | null, CheckTreeSelect
         {isArrayNonEmpty(treeProps.data) ? (
           // 只做渲染，不做逻辑处理（比如搜索过滤后，check操作的是对过滤后的data操作，这是不符合预期的）
           <Tree
+            size={'md'}
             className={`${prefixCls}__tree`}
             selectable={false}
             checkable
@@ -531,6 +534,10 @@ export interface CheckTreeSelectProps
    * TagInput 参数设置
    */
   tagInputProps?: TagInputMockProps
+  /**
+   * 设置尺寸
+   */
+  size?: HiBaseSizeEnum
 }
 
 if (__DEV__) {
diff --git a/packages/ui/check-tree-select/stories/index.stories.tsx b/packages/ui/check-tree-select/stories/index.stories.tsx
index 251429501..167278031 100644
--- a/packages/ui/check-tree-select/stories/index.stories.tsx
+++ b/packages/ui/check-tree-select/stories/index.stories.tsx
@@ -6,6 +6,7 @@ export * from './controlled.stories'
 export * from './uncontrolled.stories'
 export * from './tag-input-wrap.stories'
 export * from './appearance.stories'
+export * from './size.stories'
 export * from './clearable.stories'
 export * from './searchable.stories'
 // export * from './field-names.stories'
diff --git a/packages/ui/check-tree-select/stories/size.stories.tsx b/packages/ui/check-tree-select/stories/size.stories.tsx
new file mode 100644
index 000000000..9728fb9f9
--- /dev/null
+++ b/packages/ui/check-tree-select/stories/size.stories.tsx
@@ -0,0 +1,119 @@
+import React from 'react'
+import CheckTreeSelect from '../src'
+
+/**
+ * @title 不同尺寸
+ */
+export const Size = () => {
+  const [data] = React.useState([
+    {
+      title: '手机类',
+      id: '0',
+      children: [
+        {
+          title: 'Redmi系列',
+          id: '0-0',
+          disabled: true,
+          children: [
+            {
+              id: '0-0-1',
+              title: 'Redmi K30',
+            },
+            {
+              id: '0-0-2',
+              title: 'Redmi K30 Pro',
+            },
+            {
+              id: '0-0-3',
+              title: 'Redmi 10X 5G',
+            },
+            {
+              id: '0-0-4',
+              title: 'Redmi Note 8',
+            },
+            {
+              id: '0-0-5',
+              title: 'Redmi 9',
+            },
+            {
+              id: '0-0-6',
+              title: 'Redmi 9A',
+            },
+          ],
+        },
+        {
+          title: '小米手机',
+          id: '0-1',
+          children: [
+            {
+              id: '0-1-1',
+              title: '小米10 Pro',
+            },
+            {
+              id: '0-1-2',
+              title: '小米10',
+            },
+            {
+              id: '0-1-3',
+              title: '小米10 青春版 5G',
+            },
+            {
+              id: '0-1-4',
+              title: '小米MIX Alpha',
+            },
+          ],
+        },
+      ],
+    },
+    {
+      title: '电视',
+      id: '1',
+      children: [
+        {
+          title: '小米电视 大师 65英寸OLED',
+          id: '1-0',
+        },
+        {
+          title: 'Redmi 智能电视 MAX 98',
+          id: '1-1',
+        },
+        {
+          title: '小米电视4A 60英寸',
+          id: '1-2',
+        },
+      ],
+    },
+  ])
+
+  return (
+    <>
+      <h1>Size</h1>
+      <div className="check-tree-select-size__wrap">
+        <h2>sm</h2>
+        <CheckTreeSelect
+          style={{ width: 240 }}
+          size="sm"
+          data={data}
+          checkedMode="PARENT"
+          onChange={console.log}
+        />
+        <h2>md</h2>
+        <CheckTreeSelect
+          style={{ width: 240 }}
+          size="md"
+          data={data}
+          checkedMode="PARENT"
+          onChange={console.log}
+        />
+        <h2>lg</h2>
+        <CheckTreeSelect
+          style={{ width: 240 }}
+          size="lg"
+          data={data}
+          checkedMode="PARENT"
+          onChange={console.log}
+        />
+      </div>
+    </>
+  )
+}