diff --git a/components/float-button/style/index.tsx b/components/float-button/style/index.tsx
index ce82dfdf7b..05d391d846 100644
--- a/components/float-button/style/index.tsx
+++ b/components/float-button/style/index.tsx
@@ -80,7 +80,7 @@ const initFloatButtonGroupMotion = (token: FloatButtonToken) => {
 
 // ============================== Group ==============================
 const floatButtonGroupStyle: GenerateStyle<FloatButtonToken, CSSObject> = (token) => {
-  const { componentCls, floatButtonSize, margin, borderRadius } = token;
+  const { componentCls, floatButtonSize, margin, borderRadiusLG } = token;
   const groupPrefixCls = `${componentCls}-group`;
   return {
     [groupPrefixCls]: {
@@ -95,7 +95,7 @@ const floatButtonGroupStyle: GenerateStyle<FloatButtonToken, CSSObject> = (token
       minHeight: floatButtonSize,
       insetInlineEnd: token.floatButtonInsetInlineEnd,
       insetBlockEnd: token.floatButtonInsetBlockEnd,
-      borderRadius: token.borderRadius,
+      borderRadius: borderRadiusLG,
 
       [`${groupPrefixCls}-wrap`]: {
         zIndex: -1,
@@ -124,12 +124,12 @@ const floatButtonGroupStyle: GenerateStyle<FloatButtonToken, CSSObject> = (token
         borderRadius: 0,
         padding: 0,
         '&:first-child': {
-          borderStartStartRadius: borderRadius,
-          borderStartEndRadius: borderRadius,
+          borderStartStartRadius: borderRadiusLG,
+          borderStartEndRadius: borderRadiusLG,
         },
         '&:last-child': {
-          borderEndStartRadius: borderRadius,
-          borderEndEndRadius: borderRadius,
+          borderEndStartRadius: borderRadiusLG,
+          borderEndEndRadius: borderRadiusLG,
         },
         '&:not(:last-child)': {
           borderBottom: `${token.lineWidth}px ${token.lineType} ${token.colorSplit}`,
@@ -137,7 +137,7 @@ const floatButtonGroupStyle: GenerateStyle<FloatButtonToken, CSSObject> = (token
       },
       [`${groupPrefixCls}-wrap`]: {
         display: 'block',
-        borderRadius,
+        borderRadius: borderRadiusLG,
         boxShadow: token.boxShadowSecondary,
         overflow: 'hidden',
         [`${componentCls}-square`]: {
@@ -146,12 +146,12 @@ const floatButtonGroupStyle: GenerateStyle<FloatButtonToken, CSSObject> = (token
           borderRadius: 0,
           padding: token.paddingXXS,
           '&:first-child': {
-            borderStartStartRadius: borderRadius,
-            borderStartEndRadius: borderRadius,
+            borderStartStartRadius: borderRadiusLG,
+            borderStartEndRadius: borderRadiusLG,
           },
           '&:last-child': {
-            borderEndStartRadius: borderRadius,
-            borderEndEndRadius: borderRadius,
+            borderEndStartRadius: borderRadiusLG,
+            borderEndEndRadius: borderRadiusLG,
           },
           '&:not(:last-child)': {
             borderBottom: `${token.lineWidth}px ${token.lineType} ${token.colorSplit}`,
@@ -183,7 +183,7 @@ const floatButtonGroupStyle: GenerateStyle<FloatButtonToken, CSSObject> = (token
 
 // ============================== Shared ==============================
 const sharedFloatButtonStyle: GenerateStyle<FloatButtonToken, CSSObject> = (token) => {
-  const { componentCls, floatButtonIconSize, floatButtonSize } = token;
+  const { componentCls, floatButtonIconSize, floatButtonSize, borderRadiusLG } = token;
   return {
     [componentCls]: {
       ...resetComponent(token),
@@ -212,8 +212,8 @@ const sharedFloatButtonStyle: GenerateStyle<FloatButtonToken, CSSObject> = (toke
       },
 
       [`${componentCls}-body`]: {
-        width: floatButtonSize,
-        height: floatButtonSize,
+        width: '100%',
+        height: '100%',
         display: 'flex',
         justifyContent: 'center',
         alignItems: 'center',
@@ -247,7 +247,7 @@ const sharedFloatButtonStyle: GenerateStyle<FloatButtonToken, CSSObject> = (toke
     [`${componentCls}-square`]: {
       height: 'auto',
       minHeight: floatButtonSize,
-      borderRadius: token.borderRadius,
+      borderRadius: borderRadiusLG,
       [`${componentCls}-body`]: {
         height: 'auto',
         borderRadius: token.borderRadiusSM,