diff --git a/components/affix/index.tsx b/components/affix/index.tsx
index 7230e9aaecc1..7f25f749c7d3 100644
--- a/components/affix/index.tsx
+++ b/components/affix/index.tsx
@@ -53,7 +53,7 @@ interface AffixState {
   prevTarget: Window | HTMLElement | null;
 }
 
-interface AffixRef {
+export interface AffixRef {
   updatePosition: ReturnType<typeof throttleByAnimationFrame>;
 }
 
diff --git a/components/index.ts b/components/index.ts
index 823eea853501..c1f5f82764f9 100644
--- a/components/index.ts
+++ b/components/index.ts
@@ -1,7 +1,7 @@
 export type { Breakpoint } from './_util/responsiveObserver';
 export type { GetProps, GetRef, GetProp } from './_util/type';
 export { default as Affix } from './affix';
-export type { AffixProps } from './affix';
+export type { AffixProps, AffixRef } from './affix';
 export { default as Alert } from './alert';
 export type { AlertProps } from './alert';
 export { default as Anchor } from './anchor';