diff --git a/docs/doc/kernel/tmr.md b/docs/doc/kernel/tmr.md
index d9659c9..bf20acb 100644
--- a/docs/doc/kernel/tmr.md
+++ b/docs/doc/kernel/tmr.md
@@ -144,6 +144,3 @@ xs_int32 xs_UserTimerModify(xs_uint16 id, xs_tick_x ticks);
 | id | 待修改超时时间的软件定时器ID |
 | ticks | 超时时间 |
 
-```c
-struct xs_Timer* xs_UserTimerSearch(xs_uint16 id);
-```