diff --git a/System/os_handler.c b/System/os_handler.c
index 878009f0..637a4293 100644
--- a/System/os_handler.c
+++ b/System/os_handler.c
@@ -4,7 +4,7 @@
  * @brief    tCosyTick_Handler and sPendSV_Handler
  * @author   迟凯峰
  * @version  v3.0.4
- * @date     2026.08.06
+ * @date     2026.08.07
  ******************************************************************************/
 
 #include "os_var.h"
@@ -525,7 +525,7 @@ __IAR_WEAK s_u8_t sPendSV_Handler(void) MCUCFG_OSIT_ATTRIBUTE
 	
 	/* 每监控（每PendSV假定切换任务）*/
 	#if (SYSCFG_DEBUGGING == __ENABLED__)
-	if(true){
+	if(s_task_current != OS_NULL){
 		m_stacklen_t len = mTaskStack_Check0();
 		if(s_task_current->stacklen_max < len){
 			s_task_current->stacklen_max = len;