diff --git a/Port/8051/port_8051.h b/Port/8051/port_8051.h
index b732bda6..78ac24c3 100644
--- a/Port/8051/port_8051.h
+++ b/Port/8051/port_8051.h
@@ -3,8 +3,8 @@
  * @file     port_8051.h
  * @brief    8051 Core Port File
  * @author   迟凯峰
- * @version  V1.0.0
- * @date     2025.02.08
+ * @version  V1.0.1
+ * @date     2025.02.18
  ******************************************************************************/
 
 #ifndef __PORT_8051_H
@@ -144,8 +144,9 @@ do{ \
 
 #define mSysTick_Counting \
 do{ \
-	if(mSysTick_Counter <= tick_temp) break; \
-	s_tick_counter1 += mSysTick_Counter - tick_temp; \
+	m_tick_t temp = mSysTick_Counter; \
+	if(temp <= tick_temp) break; \
+	s_tick_counter1 += temp - tick_temp; \
 	s_tick_counter2++; \
 }while(false)