diff --git a/components/badge/Badge.tsx b/components/badge/Badge.tsx
index e1d8a9e6d..30195d049 100644
--- a/components/badge/Badge.tsx
+++ b/components/badge/Badge.tsx
@@ -107,7 +107,7 @@ export default defineComponent({
     const statusCls = computed(() => ({
       [`${prefixCls.value}-status-dot`]: hasStatus.value,
       [`${prefixCls.value}-status-${props.status}`]: !!props.status,
-      [`${prefixCls.value}-status-${props.color}`]: isInternalColor.value,
+      [`${prefixCls.value}-color-${props.color}`]: isInternalColor.value,
     }));
 
     const statusStyle = computed(() => {
@@ -125,7 +125,7 @@ export default defineComponent({
       [`${prefixCls.value}-multiple-words`]:
         !isDotRef.value && displayCount.value && displayCount.value.toString().length > 1,
       [`${prefixCls.value}-status-${props.status}`]: !!props.status,
-      [`${prefixCls.value}-status-${props.color}`]: isInternalColor.value,
+      [`${prefixCls.value}-color-${props.color}`]: isInternalColor.value,
     }));
 
     return () => {
diff --git a/components/badge/style/index.ts b/components/badge/style/index.ts
index 1e46c6007..67ac2c829 100644
--- a/components/badge/style/index.ts
+++ b/components/badge/style/index.ts
@@ -73,9 +73,12 @@ const genSharedBadgeStyle: GenerateStyle<BadgeToken> = (token: BadgeToken): CSSO
   const ribbonPrefixCls = `${antCls}-ribbon`;
   const ribbonWrapperPrefixCls = `${antCls}-ribbon-wrapper`;
 
-  const statusPreset = genPresetColor(token, (colorKey, { darkColor }) => ({
-    [`${componentCls}-status-${colorKey}`]: {
+  const colorPreset = genPresetColor(token, (colorKey, { darkColor }) => ({
+    [`&${componentCls} ${componentCls}-color-${colorKey}`]: {
       background: darkColor,
+      [`&:not(${componentCls}-count)`]: {
+        color: darkColor,
+      },
     },
   }));
 
@@ -150,9 +153,9 @@ const genSharedBadgeStyle: GenerateStyle<BadgeToken> = (token: BadgeToken): CSSO
         insetInlineEnd: 0,
         transform: 'translate(50%, -50%)',
         transformOrigin: '100% 0%',
-        [`${iconCls}-spin`]: {
+        [`&${iconCls}-spin`]: {
           animationName: antBadgeLoadingCircle,
-          animationDuration: token.motionDurationMid,
+          animationDuration: '1s',
           animationIterationCount: 'infinite',
           animationTimingFunction: 'linear',
         },
@@ -207,13 +210,13 @@ const genSharedBadgeStyle: GenerateStyle<BadgeToken> = (token: BadgeToken): CSSO
         [`${componentCls}-status-warning`]: {
           backgroundColor: token.colorWarning,
         },
-        ...statusPreset,
         [`${componentCls}-status-text`]: {
           marginInlineStart: marginXS,
           color: token.colorText,
           fontSize: token.fontSize,
         },
       },
+      ...colorPreset,
       [`${componentCls}-zoom-appear, ${componentCls}-zoom-enter`]: {
         animationName: antZoomBadgeIn,
         animationDuration: token.motionDurationSlow,
@@ -284,7 +287,6 @@ const genSharedBadgeStyle: GenerateStyle<BadgeToken> = (token: BadgeToken): CSSO
       ...resetComponent(token),
       position: 'absolute',
       top: marginXS,
-      height: badgeFontHeight,
       padding: `0 ${token.paddingXS}px`,
       color: token.colorPrimary,
       lineHeight: `${badgeFontHeight}px`,
diff --git a/components/float-button/FloatButton.tsx b/components/float-button/FloatButton.tsx
index 228a4a454..3f4575d04 100644
--- a/components/float-button/FloatButton.tsx
+++ b/components/float-button/FloatButton.tsx
@@ -1,6 +1,7 @@
 import classNames from '../_util/classNames';
 import { defineComponent, computed, ref } from 'vue';
 import Tooltip from '../tooltip';
+import Badge from '../badge';
 import Content from './FloatButtonContent';
 import useConfigInject from '../config-provider/hooks/useConfigInject';
 import { useInjectFloatButtonGroupContext } from './context';
@@ -37,6 +38,7 @@ const FloatButton = defineComponent({
         shape = 'circle',
         description = slots.description?.(),
         tooltip,
+        badge = {},
         ...restProps
       } = props;
 
@@ -60,15 +62,17 @@ const FloatButton = defineComponent({
                 ? () => (slots.tooltip && slots.tooltip()) || tooltip
                 : undefined,
             default: () => (
-              <div class={`${prefixCls.value}-body`}>
-                <Content
-                  prefixCls={prefixCls.value}
-                  v-slots={{
-                    icon: slots.icon,
-                    description: () => description,
-                  }}
-                ></Content>
-              </div>
+              <Badge {...badge}>
+                <div class={`${prefixCls.value}-body`}>
+                  <Content
+                    prefixCls={prefixCls.value}
+                    v-slots={{
+                      icon: slots.icon,
+                      description: () => description,
+                    }}
+                  ></Content>
+                </div>
+              </Badge>
             ),
           }}
         ></Tooltip>
diff --git a/components/float-button/__tests__/__snapshots__/demo.test.js.snap b/components/float-button/__tests__/__snapshots__/demo.test.js.snap
index 654b3fab2..4fcd2217f 100644
--- a/components/float-button/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/float-button/__tests__/__snapshots__/demo.test.js.snap
@@ -20,6 +20,44 @@ exports[`renders ./components/float-button/demo/back-top.vue correctly 1`] = `
 </div>
 `;
 
+exports[`renders ./components/float-button/demo/badge.vue correctly 1`] = `
+<button style="right: 164px;" class="ant-float-btn ant-float-btn-default ant-float-btn-circle" type="button"><span class="ant-badge"><div class="ant-float-btn-body"><div class="ant-float-btn-content"><div class="ant-float-btn-icon"><span role="img" aria-label="file-text" class="anticon anticon-file-text"><svg focusable="false" class="" data-icon="file-text" width="1em" height="1em" fill="currentColor" aria-hidden="true" viewBox="64 64 896 896"><path d="M854.6 288.6L639.4 73.4c-6-6-14.1-9.4-22.6-9.4H192c-17.7 0-32 14.3-32 32v832c0 17.7 14.3 32 32 32h640c17.7 0 32-14.3 32-32V311.3c0-8.5-3.4-16.7-9.4-22.7zM790.2 326H602V137.8L790.2 326zm1.8 562H232V136h302v216a42 42 0 0042 42h216v494zM504 618H320c-4.4 0-8 3.6-8 8v48c0 4.4 3.6 8 8 8h184c4.4 0 8-3.6 8-8v-48c0-4.4-3.6-8-8-8zM312 490v48c0 4.4 3.6 8 8 8h384c4.4 0 8-3.6 8-8v-48c0-4.4-3.6-8-8-8H320c-4.4 0-8 3.6-8 8z"></path></svg></span></div>
+  </div>
+  </div><sup data-show="true" class="ant-scroll-number ant-badge-dot"></sup>
+  <!----></span>
+  <!---->
+</button>
+<div style="right: 94px;" class="ant-float-btn-group ant-float-btn-group-circle ant-float-btn-group-circle-shadow"><button class="ant-float-btn ant-float-btn-default ant-float-btn-circle" type="button"><span class="ant-badge"><div class="ant-float-btn-body"><div class="ant-float-btn-content"><div class="ant-float-btn-icon"><span role="img" aria-label="file-text" class="anticon anticon-file-text"><svg focusable="false" class="" data-icon="file-text" width="1em" height="1em" fill="currentColor" aria-hidden="true" viewBox="64 64 896 896"><path d="M854.6 288.6L639.4 73.4c-6-6-14.1-9.4-22.6-9.4H192c-17.7 0-32 14.3-32 32v832c0 17.7 14.3 32 32 32h640c17.7 0 32-14.3 32-32V311.3c0-8.5-3.4-16.7-9.4-22.7zM790.2 326H602V137.8L790.2 326zm1.8 562H232V136h302v216a42 42 0 0042 42h216v494zM504 618H320c-4.4 0-8 3.6-8 8v48c0 4.4 3.6 8 8 8h184c4.4 0 8-3.6 8-8v-48c0-4.4-3.6-8-8-8zM312 490v48c0 4.4 3.6 8 8 8h384c4.4 0 8-3.6 8-8v-48c0-4.4-3.6-8-8-8H320c-4.4 0-8 3.6-8 8z"></path></svg></span></div>
+</div>
+</div><sup data-show="true" class="ant-scroll-number ant-badge-count ant-badge-color-blue" title="5"><span class="ant-scroll-number-only" style="transition: none;"><p class="ant-scroll-number-only-unit current">5</p></span></sup>
+<!----></span>
+<!----></button><button class="ant-float-btn ant-float-btn-default ant-float-btn-circle" type="button"><span class="ant-badge"><div class="ant-float-btn-body"><div class="ant-float-btn-content"><div class="ant-float-btn-icon"><span role="img" aria-label="file-text" class="anticon anticon-file-text"><svg focusable="false" class="" data-icon="file-text" width="1em" height="1em" fill="currentColor" aria-hidden="true" viewBox="64 64 896 896"><path d="M854.6 288.6L639.4 73.4c-6-6-14.1-9.4-22.6-9.4H192c-17.7 0-32 14.3-32 32v832c0 17.7 14.3 32 32 32h640c17.7 0 32-14.3 32-32V311.3c0-8.5-3.4-16.7-9.4-22.7zM790.2 326H602V137.8L790.2 326zm1.8 562H232V136h302v216a42 42 0 0042 42h216v494zM504 618H320c-4.4 0-8 3.6-8 8v48c0 4.4 3.6 8 8 8h184c4.4 0 8-3.6 8-8v-48c0-4.4-3.6-8-8-8zM312 490v48c0 4.4 3.6 8 8 8h384c4.4 0 8-3.6 8-8v-48c0-4.4-3.6-8-8-8H320c-4.4 0-8 3.6-8 8z"></path></svg></span></div>
+  </div>
+  </div><sup data-show="true" class="ant-scroll-number ant-badge-count" title="5"><span class="ant-scroll-number-only" style="transition: none;"><p class="ant-scroll-number-only-unit current">5</p></span></sup>
+  <!----></span>
+  <!---->
+</button></div>
+<div class="ant-float-btn-group ant-float-btn-group-circle ant-float-btn-group-circle-shadow"><button class="ant-float-btn ant-float-btn-default ant-float-btn-circle" type="button"><span class="ant-badge"><div class="ant-float-btn-body"><div class="ant-float-btn-content"><div class="ant-float-btn-icon"><span role="img" aria-label="question-circle" class="anticon anticon-question-circle"><svg focusable="false" class="" data-icon="question-circle" width="1em" height="1em" fill="currentColor" aria-hidden="true" viewBox="64 64 896 896"><path d="M512 64C264.6 64 64 264.6 64 512s200.6 448 448 448 448-200.6 448-448S759.4 64 512 64zm0 820c-205.4 0-372-166.6-372-372s166.6-372 372-372 372 166.6 372 372-166.6 372-372 372z"></path><path d="M623.6 316.7C593.6 290.4 554 276 512 276s-81.6 14.5-111.6 40.7C369.2 344 352 380.7 352 420v7.6c0 4.4 3.6 8 8 8h48c4.4 0 8-3.6 8-8V420c0-44.1 43.1-80 96-80s96 35.9 96 80c0 31.1-22 59.6-56.1 72.7-21.2 8.1-39.2 22.3-52.1 40.9-13.1 19-19.9 41.8-19.9 64.9V620c0 4.4 3.6 8 8 8h48c4.4 0 8-3.6 8-8v-22.7a48.3 48.3 0 0130.9-44.8c59-22.7 97.1-74.7 97.1-132.5.1-39.3-17.1-76-48.3-103.3zM472 732a40 40 0 1080 0 40 40 0 10-80 0z"></path></svg></span></div>
+<!---->
+</div>
+</div><sup data-show="true" class="ant-scroll-number ant-badge-count ant-badge-multiple-words" title="12"><span class="ant-scroll-number-only" style="transition: none;"><p class="ant-scroll-number-only-unit current">1</p></span><span class="ant-scroll-number-only" style="transition: none;"><p class="ant-scroll-number-only-unit current">2</p></span></sup>
+<!----></span>
+<!----></button><button class="ant-float-btn ant-float-btn-default ant-float-btn-circle" type="button"><span class="ant-badge"><div class="ant-float-btn-body"><div class="ant-float-btn-content"><div class="ant-float-btn-icon"><span role="img" aria-label="file-text" class="anticon anticon-file-text"><svg focusable="false" class="" data-icon="file-text" width="1em" height="1em" fill="currentColor" aria-hidden="true" viewBox="64 64 896 896"><path d="M854.6 288.6L639.4 73.4c-6-6-14.1-9.4-22.6-9.4H192c-17.7 0-32 14.3-32 32v832c0 17.7 14.3 32 32 32h640c17.7 0 32-14.3 32-32V311.3c0-8.5-3.4-16.7-9.4-22.7zM790.2 326H602V137.8L790.2 326zm1.8 562H232V136h302v216a42 42 0 0042 42h216v494zM504 618H320c-4.4 0-8 3.6-8 8v48c0 4.4 3.6 8 8 8h184c4.4 0 8-3.6 8-8v-48c0-4.4-3.6-8-8-8zM312 490v48c0 4.4 3.6 8 8 8h384c4.4 0 8-3.6 8-8v-48c0-4.4-3.6-8-8-8H320c-4.4 0-8 3.6-8 8z"></path></svg></span></div>
+  </div>
+  </div><sup data-show="true" class="ant-scroll-number ant-badge-count ant-badge-multiple-words" title="123"><span class="ant-scroll-number-only" style="transition: none;"><p class="ant-scroll-number-only-unit current">1</p></span><span class="ant-scroll-number-only" style="transition: none;"><p class="ant-scroll-number-only-unit current">2</p></span><span class="ant-scroll-number-only" style="transition: none;"><p class="ant-scroll-number-only-unit current">3</p></span></sup>
+  <!----></span>
+  <!---->
+</button><button class="ant-float-btn ant-float-btn-default ant-float-btn-circle fade-enter fade-enter-prepare fade-enter-start" type="button"><span class="ant-badge"><div class="ant-float-btn-body"><div class="ant-float-btn-content"><div class="ant-float-btn-icon"><span role="img" aria-label="vertical-align-top" class="anticon anticon-vertical-align-top"><svg focusable="false" class="" data-icon="vertical-align-top" width="1em" height="1em" fill="currentColor" aria-hidden="true" viewBox="64 64 896 896"><path d="M859.9 168H164.1c-4.5 0-8.1 3.6-8.1 8v60c0 4.4 3.6 8 8.1 8h695.8c4.5 0 8.1-3.6 8.1-8v-60c0-4.4-3.6-8-8.1-8zM518.3 355a8 8 0 00-12.6 0l-112 141.7a7.98 7.98 0 006.3 12.9h73.9V848c0 4.4 3.6 8 8 8h60c4.4 0 8-3.6 8-8V509.7H624c6.7 0 10.4-7.7 6.3-12.9L518.3 355z"></path></svg></span></div>
+  <!---->
+  </div>
+  </div><sup data-show="false" class="ant-scroll-number ant-badge-count" style="display: none;">
+    <!---->
+  </sup>
+  <!----></span>
+  <!---->
+</button></div>
+`;
+
 exports[`renders ./components/float-button/demo/basic.vue correctly 1`] = `
 <button class="ant-float-btn ant-float-btn-default ant-float-btn-circle" type="button">
   <!---->
diff --git a/components/float-button/demo/badge.vue b/components/float-button/demo/badge.vue
new file mode 100644
index 000000000..a3f1252d4
--- /dev/null
+++ b/components/float-button/demo/badge.vue
@@ -0,0 +1,42 @@
+<docs>
+---
+order: 8
+iframe: 360
+title:
+  zh-CN: 徽标数
+  en-US: Badge
+---
+
+## zh-CN
+
+右上角附带圆形徽标数字的悬浮按钮。
+
+## en-US
+
+FloatButton with Badge.
+
+</docs>
+
+<template>
+  <a-float-button shape="circle" :badge="{ dot: true }" :style="{ right: '164px' }" />
+  <a-float-button-group shape="circle" :style="{ right: '94px' }">
+    <a-float-button :badge="{ count: 5, color: 'blue' }">
+      <template #tooltip>
+        <div>custom badge color</div>
+      </template>
+    </a-float-button>
+    <a-float-button :badge="{ count: 5 }"></a-float-button>
+  </a-float-button-group>
+  <a-float-button-group shape="circle">
+    <a-float-button :badge="{ count: 12 }">
+      <template #icon>
+        <QuestionCircleOutlined />
+      </template>
+    </a-float-button>
+    <a-float-button :badge="{ count: 123, overflowCount: 999 }"></a-float-button>
+    <a-back-top :visibility-height="0" />
+  </a-float-button-group>
+</template>
+<script setup>
+import { QuestionCircleOutlined } from '@ant-design/icons-vue';
+</script>
diff --git a/components/float-button/demo/index.vue b/components/float-button/demo/index.vue
index caa7ba782..16cd78d0d 100644
--- a/components/float-button/demo/index.vue
+++ b/components/float-button/demo/index.vue
@@ -23,6 +23,9 @@
   <template v-else-if="iframeName === 'backtop'">
     <back-top></back-top>
   </template>
+  <template v-else-if="iframeName === 'badge'">
+    <badge></badge>
+  </template>
   <demo-sort v-else>
     <basic></basic>
     <type></type>
@@ -32,6 +35,7 @@
     <group></group>
     <group-menu></group-menu>
     <back-top></back-top>
+    <badge></badge>
   </demo-sort>
 </template>
 
@@ -44,6 +48,7 @@ import Tooltip from './tooltip.vue';
 import group from './group.vue';
 import GroupMenu from './group-menu.vue';
 import BackTop from './back-top.vue';
+import Badge from './badge.vue';
 
 import { defineComponent, provide } from 'vue';
 import US from '../index.en-US.md';
@@ -61,6 +66,7 @@ export default defineComponent({
     group,
     GroupMenu,
     BackTop,
+    Badge,
   },
   props: {
     iframeName: String,
@@ -78,6 +84,7 @@ export default defineComponent({
             'floatbutton-group': '/iframe/float-button/#floatbutton-group',
             'menu-mode': '/iframe/float-button/#menu-mode',
             backtop: '/iframe/float-button/#backtop',
+            badge: '/iframe/float-button/#badge',
           }
         : {},
     );
diff --git a/components/float-button/index.en-US.md b/components/float-button/index.en-US.md
index 0ad788745..1348afd31 100644
--- a/components/float-button/index.en-US.md
+++ b/components/float-button/index.en-US.md
@@ -28,6 +28,7 @@ FloatButton. Available since `4.0.0`.
 | shape | Setting button shape | `circle` \| `square` | `circle` |  |
 | href | The target of hyperlink | string | - |  |
 | target | Specifies where to display the linked URL | string | - |  |
+| badge | Attach Badge to FloatButton. `status` and other props related are not supported. | [BadgeProps](/components/badge#api) | - |  |
 
 ### common events
 
diff --git a/components/float-button/index.zh-CN.md b/components/float-button/index.zh-CN.md
index 83fb6b345..1e109dbea 100644
--- a/components/float-button/index.zh-CN.md
+++ b/components/float-button/index.zh-CN.md
@@ -30,6 +30,7 @@ coverDark: https://mdn.alipayobjects.com/huamei_7uahnr/afts/img/A*a0hwTY_rOSUAAA
 | onClick | 点击按钮时的回调 | (event) => void | - |  |
 | href | 点击跳转的地址，指定此属性 button 的行为和 a 链接一致 | string | - |  |
 | target | 相当于 a 标签的 target 属性，href 存在时生效 | string | - |  |
+| badge | 带徽标数字的悬浮按钮（不支持 status 以及相关属性） | [BadgeProps](/components/badge-cn#api) | - |  |
 
 ### common events
 
diff --git a/components/float-button/interface.ts b/components/float-button/interface.ts
index a60e1afce..6561910b8 100644
--- a/components/float-button/interface.ts
+++ b/components/float-button/interface.ts
@@ -1,7 +1,8 @@
 import type { ExtractPropTypes } from 'vue';
 import PropTypes from '../_util/vue-types';
 import type { MouseEventHandler } from '../_util/EventInterface';
-import { stringType, booleanType, functionType } from '../_util/type';
+import { stringType, booleanType, functionType, objectType } from '../_util/type';
+import type { BadgeProps } from '../badge';
 
 export type FloatButtonType = 'default' | 'primary';
 
@@ -9,6 +10,8 @@ export type FloatButtonShape = 'circle' | 'square';
 
 export type FloatButtonGroupTrigger = 'click' | 'hover';
 
+export type FloatButtonBadgeProps = Omit<BadgeProps, 'status' | 'text' | 'title' | 'children'>;
+
 export const floatButtonProps = () => {
   return {
     prefixCls: String,
@@ -18,6 +21,7 @@ export const floatButtonProps = () => {
     tooltip: PropTypes.any,
     href: String,
     target: functionType<() => Window | HTMLElement | null>(),
+    badge: objectType<FloatButtonBadgeProps>(),
     onClick: functionType<MouseEventHandler>(),
   };
 };
diff --git a/components/float-button/style/index.ts b/components/float-button/style/index.ts
index 86d786ef3..24fcd018e 100644
--- a/components/float-button/style/index.ts
+++ b/components/float-button/style/index.ts
@@ -5,6 +5,7 @@ import { genComponentStyleHook, mergeToken } from '../../theme/internal';
 import { initFadeMotion } from '../../style/motion/fade';
 import { resetComponent } from '../../style';
 import { initMotion } from '../../style/motion/motion';
+import getOffset from '../util';
 
 /** Component only token. Which will handle additional calculation of alias token */
 export interface ComponentToken {
@@ -18,6 +19,11 @@ type FloatButtonToken = FullToken<'FloatButton'> & {
   floatButtonFontSize: number;
   floatButtonSize: number;
   floatButtonIconSize: number;
+  floatButtonBodySize: number;
+  floatButtonBodyPadding: number;
+  badgeOffset: number;
+  dotOffsetInCircle: number;
+  dotOffsetInSquare: number;
 
   // Position
   floatButtonInsetBlockEnd: number;
@@ -80,7 +86,16 @@ const initFloatButtonGroupMotion = (token: FloatButtonToken) => {
 
 // ============================== Group ==============================
 const floatButtonGroupStyle: GenerateStyle<FloatButtonToken, CSSObject> = token => {
-  const { componentCls, floatButtonSize, margin, borderRadiusLG } = token;
+  const {
+    antCls,
+    componentCls,
+    floatButtonSize,
+    margin,
+    borderRadiusLG,
+    borderRadiusSM,
+    badgeOffset,
+    floatButtonBodyPadding,
+  } = token;
   const groupPrefixCls = `${componentCls}-group`;
   return {
     [groupPrefixCls]: {
@@ -116,6 +131,7 @@ const floatButtonGroupStyle: GenerateStyle<FloatButtonToken, CSSObject> = token
         [`${componentCls}-body`]: {
           width: floatButtonSize,
           height: floatButtonSize,
+          borderRadius: '50%',
         },
       },
     },
@@ -134,17 +150,22 @@ const floatButtonGroupStyle: GenerateStyle<FloatButtonToken, CSSObject> = token
         '&:not(:last-child)': {
           borderBottom: `${token.lineWidth}px ${token.lineType} ${token.colorSplit}`,
         },
+        [`${antCls}-badge`]: {
+          [`${antCls}-badge-count`]: {
+            top: -(floatButtonBodyPadding + badgeOffset),
+            insetInlineEnd: -(floatButtonBodyPadding + badgeOffset),
+          },
+        },
       },
       [`${groupPrefixCls}-wrap`]: {
         display: 'block',
         borderRadius: borderRadiusLG,
         boxShadow: token.boxShadowSecondary,
-        overflow: 'hidden',
         [`${componentCls}-square`]: {
           boxShadow: 'none',
           marginTop: 0,
           borderRadius: 0,
-          padding: token.paddingXXS,
+          padding: floatButtonBodyPadding,
           '&:first-child': {
             borderStartStartRadius: borderRadiusLG,
             borderStartEndRadius: borderRadiusLG,
@@ -157,8 +178,8 @@ const floatButtonGroupStyle: GenerateStyle<FloatButtonToken, CSSObject> = token
             borderBottom: `${token.lineWidth}px ${token.lineType} ${token.colorSplit}`,
           },
           [`${componentCls}-body`]: {
-            width: floatButtonSize - token.paddingXXS * 2,
-            height: floatButtonSize - token.paddingXXS * 2,
+            width: token.floatButtonBodySize,
+            height: token.floatButtonBodySize,
           },
         },
       },
@@ -171,10 +192,11 @@ const floatButtonGroupStyle: GenerateStyle<FloatButtonToken, CSSObject> = token
       boxShadow: token.boxShadowSecondary,
       [`${componentCls}-square`]: {
         boxShadow: 'none',
-        padding: token.paddingXXS,
+        padding: floatButtonBodyPadding,
         [`${componentCls}-body`]: {
-          width: floatButtonSize - token.paddingXXS * 2,
-          height: floatButtonSize - token.paddingXXS * 2,
+          width: token.floatButtonBodySize,
+          height: token.floatButtonBodySize,
+          borderRadius: borderRadiusSM,
         },
       },
     },
@@ -183,14 +205,23 @@ const floatButtonGroupStyle: GenerateStyle<FloatButtonToken, CSSObject> = token
 
 // ============================== Shared ==============================
 const sharedFloatButtonStyle: GenerateStyle<FloatButtonToken, CSSObject> = token => {
-  const { componentCls, floatButtonIconSize, floatButtonSize, borderRadiusLG } = token;
+  const {
+    antCls,
+    componentCls,
+    floatButtonBodyPadding,
+    floatButtonIconSize,
+    floatButtonSize,
+    borderRadiusLG,
+    badgeOffset,
+    dotOffsetInSquare,
+    dotOffsetInCircle,
+  } = token;
   return {
     [componentCls]: {
       ...resetComponent(token),
       border: 'none',
       position: 'fixed',
       cursor: 'pointer',
-      overflow: 'hidden',
       zIndex: 99,
       display: 'block',
       justifyContent: 'center',
@@ -210,7 +241,16 @@ const sharedFloatButtonStyle: GenerateStyle<FloatButtonToken, CSSObject> = token
       '&:empty': {
         display: 'none',
       },
-
+      [`${antCls}-badge`]: {
+        width: '100%',
+        height: '100%',
+        [`${antCls}-badge-count`]: {
+          transform: 'translate(0, 0)',
+          transformOrigin: 'center',
+          top: -badgeOffset,
+          insetInlineEnd: -badgeOffset,
+        },
+      },
       [`${componentCls}-body`]: {
         width: '100%',
         height: '100%',
@@ -226,7 +266,7 @@ const sharedFloatButtonStyle: GenerateStyle<FloatButtonToken, CSSObject> = token
           flexDirection: 'column',
           justifyContent: 'center',
           alignItems: 'center',
-          padding: `2px 4px`,
+          padding: `${floatButtonBodyPadding / 2}px ${floatButtonBodyPadding}px`,
           [`${componentCls}-icon`]: {
             textAlign: 'center',
             margin: 'auto',
@@ -237,9 +277,18 @@ const sharedFloatButtonStyle: GenerateStyle<FloatButtonToken, CSSObject> = token
         },
       },
     },
+    [`${componentCls}-rtl`]: {
+      direction: 'rtl',
+    },
     [`${componentCls}-circle`]: {
       height: floatButtonSize,
       borderRadius: '50%',
+      [`${antCls}-badge`]: {
+        [`${antCls}-badge-dot`]: {
+          top: dotOffsetInCircle,
+          insetInlineEnd: dotOffsetInCircle,
+        },
+      },
       [`${componentCls}-body`]: {
         borderRadius: '50%',
       },
@@ -248,9 +297,15 @@ const sharedFloatButtonStyle: GenerateStyle<FloatButtonToken, CSSObject> = token
       height: 'auto',
       minHeight: floatButtonSize,
       borderRadius: borderRadiusLG,
+      [`${antCls}-badge`]: {
+        [`${antCls}-badge-dot`]: {
+          top: dotOffsetInSquare,
+          insetInlineEnd: dotOffsetInSquare,
+        },
+      },
       [`${componentCls}-body`]: {
         height: 'auto',
-        borderRadius: token.borderRadiusSM,
+        borderRadius: borderRadiusLG,
       },
     },
     [`${componentCls}-default`]: {
@@ -312,6 +367,8 @@ export default genComponentStyleHook<'FloatButton'>('FloatButton', token => {
     fontSize,
     fontSizeIcon,
     controlItemBgHover,
+    paddingXXS,
+    borderRadiusLG,
   } = token;
   const floatButtonToken = mergeToken<FloatButtonToken>(token, {
     floatButtonBackgroundColor: colorBgElevated,
@@ -323,6 +380,12 @@ export default genComponentStyleHook<'FloatButton'>('FloatButton', token => {
 
     floatButtonInsetBlockEnd: marginXXL,
     floatButtonInsetInlineEnd: marginLG,
+    floatButtonBodySize: controlHeightLG - paddingXXS * 2,
+    // 这里的 paddingXXS 是简写，完整逻辑是 (controlHeightLG - (controlHeightLG - paddingXXS * 2)) / 2,
+    floatButtonBodyPadding: paddingXXS,
+    badgeOffset: paddingXXS * 1.5,
+    dotOffsetInCircle: getOffset(controlHeightLG / 2),
+    dotOffsetInSquare: getOffset(borderRadiusLG),
   });
   return [
     floatButtonGroupStyle(floatButtonToken),
diff --git a/components/float-button/util.ts b/components/float-button/util.ts
new file mode 100644
index 000000000..1cee7c3af
--- /dev/null
+++ b/components/float-button/util.ts
@@ -0,0 +1,10 @@
+const getOffset = (radius: number): number => {
+  if (radius === 0) {
+    return 0;
+  }
+  // 如果要考虑通用性，这里应该用三角函数 Math.sin(45)
+  // 但是这个场景比较特殊，始终是等腰直角三角形，所以直接用 Math.sqrt() 开方即可
+  return radius - Math.sqrt(radius ** 2 / 2);
+};
+
+export default getOffset;