diff --git a/graphic/graphic_2d/native_vsync/native_vsync.h b/graphic/graphic_2d/native_vsync/native_vsync.h
index 610fe1debc2c44e035005c71cd5a060d19a7eb2d..ef4cf0389b273c2b0cc256b82151c3b93dc3eb63 100644
--- a/graphic/graphic_2d/native_vsync/native_vsync.h
+++ b/graphic/graphic_2d/native_vsync/native_vsync.h
@@ -45,6 +45,14 @@ extern "C" {
 
 struct OH_NativeVSync;
 typedef struct OH_NativeVSync OH_NativeVSync;
+/**
+* @brief Defines the callback function handle for the post-process when next vsync coming.
+*
+* @param timestamp Indicates the system timestamp obtained by CLOCK_MONOTONIC in nanoseconds.
+* @param data Indicates the user defined data.
+* @since 9
+* @version 1.0
+*/
 typedef void (*OH_NativeVSync_FrameCallback)(long long timestamp, void *data);
 
 /**