diff --git a/packages/components/fab/README.en-US.md b/packages/components/fab/README.en-US.md
index b3f1dc45d..419b09005 100644
--- a/packages/components/fab/README.en-US.md
+++ b/packages/components/fab/README.en-US.md
@@ -8,12 +8,12 @@ name | type | default | description | required
 -- | -- | -- | -- | --
 style | Object | - | CSS(Cascading Style Sheets) | N
 custom-style | Object | - | CSS(Cascading Style Sheets)，used to set style on virtual component | N
-button-props | Object | - | Typescript：`ButtonProps`，[Button API Documents](./button?tab=api)。[see more ts definition](https://github.com/Tencent/tdesign-miniprogram/blob/develop/packages/components/fab/type.ts) | N
-draggable | String / Boolean | false | Typescript：`boolean \| FabDirectionEnum ` `type FabDirectionEnum = 'all' \| 'vertical' \| 'horizontal'`。[see more ts definition](https://github.com/Tencent/tdesign-miniprogram/blob/develop/packages/components/fab/type.ts) | N
-icon | String | - | \- | N
+button-props | Object | - | Typescript: `ButtonProps`，[Button API Documents](./button?tab=api)。[see more ts definition](https://github.com/Tencent/tdesign-miniprogram/blob/develop/packages/components/fab/type.ts) | N
+draggable | String / Boolean | false | Typescript: `boolean \| FabDirectionEnum ` `type FabDirectionEnum = 'all' \| 'vertical' \| 'horizontal'`。[see more ts definition](https://github.com/Tencent/tdesign-miniprogram/blob/develop/packages/components/fab/type.ts) | N
+icon | String / Object | - | icon name | N
 text | String | - | \- | N
 using-custom-navbar | Boolean | false | \- | N
-y-bounds | Array | - | Typescript：`Array<string \| number>` | N
+y-bounds | Array | - | Typescript: `Array<string \| number>` | N
 
 ### Fab Events
 
diff --git a/packages/components/fab/README.md b/packages/components/fab/README.md
index fe5779032..3a75dc7da 100644
--- a/packages/components/fab/README.md
+++ b/packages/components/fab/README.md
@@ -72,7 +72,7 @@ style | Object | - | 样式 | N
 custom-style | Object | - | 样式，一般用于开启虚拟化组件节点场景 | N
 button-props | Object | - | 透传至 Button 组件。TS 类型：`ButtonProps`，[Button API Documents](./button?tab=api)。[详细类型定义](https://github.com/Tencent/tdesign-miniprogram/blob/develop/packages/components/fab/type.ts) | N
 draggable | String / Boolean | false | 是否可拖拽。`true` / `'all'`可拖动<br>`'vertical'`可垂直拖动<br>`'horizontal'`可水平拖动<br>`false`禁止拖动。TS 类型：`boolean \| FabDirectionEnum ` `type FabDirectionEnum = 'all' \| 'vertical' \| 'horizontal'`。[详细类型定义](https://github.com/Tencent/tdesign-miniprogram/blob/develop/packages/components/fab/type.ts) | N
-icon | String | - | 图标 | N
+icon | String / Object | - | 图标名称。值为字符串表示图标名称，值为 `Object` 类型，表示透传至 `icon` 组件 | N
 text | String | - | 文本内容 | N
 using-custom-navbar | Boolean | false | 是否使用了自定义导航栏 | N
 y-bounds | Array | - | 设置垂直方向边界限制，示例：[48, 48] 或 ['96px', 80]。TS 类型：`Array<string \| number>` | N
diff --git a/packages/components/fab/fab.ts b/packages/components/fab/fab.ts
index 697750f9b..0041f6918 100644
--- a/packages/components/fab/fab.ts
+++ b/packages/components/fab/fab.ts
@@ -2,7 +2,7 @@ import { SuperComponent, wxComponent } from '../common/src/index';
 import config from '../common/config';
 import props from './props';
 import useCustomNavbar from '../mixins/using-custom-navbar';
-import { unitConvert, systemInfo } from '../common/utils';
+import { calcIcon, unitConvert, systemInfo } from '../common/utils';
 
 const { prefix } = config;
 const name = `${prefix}-fab`;
@@ -36,7 +36,7 @@ export default class Fab extends SuperComponent {
             ...baseButtonProps,
             shape: this.properties.text ? 'round' : 'circle',
             ...this.properties.buttonProps,
-            icon: this.properties.icon,
+            icon: calcIcon(this.properties.icon),
             content: this.properties.text,
             ariaLabel: this.properties.ariaLabel,
           },
diff --git a/packages/components/fab/props.ts b/packages/components/fab/props.ts
index 37e3f5591..6a8bf1f55 100644
--- a/packages/components/fab/props.ts
+++ b/packages/components/fab/props.ts
@@ -15,10 +15,9 @@ const props: TdFabProps = {
     type: null,
     value: false,
   },
-  /** 图标 */
+  /** 图标名称。值为字符串表示图标名称，值为 `Object` 类型，表示透传至 `icon` 组件 */
   icon: {
-    type: String,
-    value: '',
+    type: null,
   },
   /** 悬浮按钮的样式，常用于调整位置（即将废弃，建议使用 `style`） */
   style: {
diff --git a/packages/components/fab/type.ts b/packages/components/fab/type.ts
index 37575f764..96ed8bf21 100644
--- a/packages/components/fab/type.ts
+++ b/packages/components/fab/type.ts
@@ -23,12 +23,11 @@ export interface TdFabProps {
     value?: boolean | FabDirectionEnum;
   };
   /**
-   * 图标
-   * @default ''
+   * 图标名称。值为字符串表示图标名称，值为 `Object` 类型，表示透传至 `icon` 组件
    */
   icon?: {
-    type: StringConstructor;
-    value?: string;
+    type: null;
+    value?: string | object;
   };
   /**
    * 悬浮按钮的样式，常用于调整位置（即将废弃，建议使用 `style`）
diff --git a/packages/tdesign-miniprogram/.changelog/pr-4400.md b/packages/tdesign-miniprogram/.changelog/pr-4400.md
new file mode 100644
index 000000000..a076bfa84
--- /dev/null
+++ b/packages/tdesign-miniprogram/.changelog/pr-4400.md
@@ -0,0 +1,6 @@
+---
+pr_number: 4400
+contributor: anlyyao
+---
+
+- feat(Fab): 为 `icon` 属性新增 `Object` 类型，支持透传到图标组件 @anlyyao ([#4400](https://github.com/Tencent/tdesign-miniprogram/pull/4400))