diff --git a/components/power/los_pm.c b/components/power/los_pm.c
index 8d4df79c..3e2922c2 100644
--- a/components/power/los_pm.c
+++ b/components/power/los_pm.c
@@ -101,21 +101,27 @@ STATIC VOID OsPmTickTimerStart(LosPmCB *pm)
     }
 
 #if (LOSCFG_BASE_CORE_TICK_WTIMER == 0)
-    if ((tickTimer->timerStop != NULL) && (pm->enterSleepTime != 0)) {
-        /* Restore the main CPU frequency */
-        sleepTime = tickTimer->timerCycleGet();
-        tickTimer->timerStop();
+    if (tickTimer->timerStop != NULL) {
+        if (pm->enterSleepTime != 0) {
+            /* Restore the main CPU frequency */
+            sleepTime = tickTimer->timerCycleGet();
+            tickTimer->timerStop();
 
-        realSleepTime = OS_SYS_CYCLE_TO_NS(sleepTime, tickTimer->freq);
-        realSleepTime = OS_SYS_NS_TO_CYCLE(realSleepTime, g_sysClock);
-        currTime = pm->enterSleepTime + realSleepTime;
-        pm->enterSleepTime = 0;
+            realSleepTime = OS_SYS_CYCLE_TO_NS(sleepTime, tickTimer->freq);
+            realSleepTime = OS_SYS_NS_TO_CYCLE(realSleepTime, g_sysClock);
+            currTime = pm->enterSleepTime + realSleepTime;
+            pm->enterSleepTime = 0;
 
-        OsTickTimerBaseReset(currTime);
-        OsSchedResetSchedResponseTime(0);
+            OsTickTimerBaseReset(currTime);
+            OsSchedResetSchedResponseTime(0);
+            /* Restart the system tick timer */
+            tickTimer->tickUnlock();
+        }
+        return;
     }
 #endif
 
+    /* Restore the system tick timer */
     tickTimer->tickUnlock();
     return;
 }
@@ -142,14 +148,21 @@ STATIC BOOL OsPmTickTimerStop(LosPmCB *pm)
         sleepCycle = OS_SYS_CYCLE_TO_NS(realSleepTime, g_sysClock);
         sleepCycle = OS_SYS_NS_TO_CYCLE(sleepCycle, tickTimer->freq);
 
+        if (sleepCycle == 0) {
+            pm->sysMode = LOS_SYS_NORMAL_SLEEP;
+            return FALSE;
+        }
+
         /* The main CPU reduces the frequency */
         pm->enterSleepTime = LOS_SysCycleGet();
+        /* Turn off the system tick timer and clear the count value to zero */
         tickTimer->tickLock();
         tickTimer->timerStart(sleepCycle);
         return TRUE;
     }
 #endif
 
+    /* Pause the system tick timer */
     tickTimer->tickLock();
     return TRUE;
 }
@@ -167,7 +180,7 @@ STATIC VOID OsPmCpuResume(LosPmCB *pm)
 
 STATIC VOID OsPmCpuSuspend(LosPmCB *pm)
 {
-    /* cpu enter low power mode */
+    /* cpu enter low-power mode */
 
     if (pm->sysMode == LOS_SYS_NORMAL_SLEEP) {
         pm->sysctrl->normalSuspend();
diff --git a/components/power/los_pm.h b/components/power/los_pm.h
index aea1dfb7..b87489f8 100644
--- a/components/power/los_pm.h
+++ b/components/power/los_pm.h
@@ -39,7 +39,7 @@
 
 /**
  * @ingroup los_pm
- * Pm error code: Invalid low power mode.
+ * Pm error code: Invalid low-power mode.
  *
  * Value: 0x02002001
  *
@@ -141,21 +141,33 @@ typedef enum {
 } LOS_PmNodeType;
 
 typedef struct {
-    UINT32 (*suspend)(UINT32 mode); /* The device enters low power consumption, Unlocked task scheduling. */
-    VOID   (*resume)(UINT32 mode);  /* The device exits from low power consumption, Unlocked task scheduling. */
+    UINT32 (*suspend)(UINT32 mode); /* The device enters low-power consumption, Unlocked task scheduling. */
+    VOID   (*resume)(UINT32 mode);  /* The device exits from low-power consumption, Unlocked task scheduling. */
 } LosPmDevice;
 
 typedef struct {
-    UINT32 freq;                   /* The frequency of the low power timer */
-    VOID   (*timerStart)(UINT64);  /* Start the low power timer */
-    VOID   (*timerStop)(VOID);     /* Stop the low power timer */
-    UINT64 (*timerCycleGet)(VOID); /* Gets the running time of the low power timer in unit cycle */
-    VOID   (*tickLock)(VOID);      /* Pause the system tick timer */
-    VOID   (*tickUnlock)(VOID);    /* Restore the system tick timer */
+    /* Low-power timer related implementation functions.
+     * The function is not NULL, the low-power timer is enabled.
+     */
+    UINT32 freq;                   /* The frequency of the low-power timer */
+    VOID   (*timerStart)(UINT64);  /* Start the low-power timer and set the response period */
+    VOID   (*timerStop)(VOID);     /* Turn off the low-power timer */
+    UINT64 (*timerCycleGet)(VOID); /* Gets the time the system sleeps */
+
+    /* When the low-power timer is enabled, the function of tickLock is to turn off the system tick timer and
+     * clear the timer's count value to zero.
+     * When the low-power timer is disabled, the function of tickLock is to pause the system timer.
+     */
+    VOID   (*tickLock)(VOID);
+
+    /* When the low-power timer is enabled, the function of tickUnlock is to restart the system tick timer.
+     * When the low-power timer is disabled, the function of tickUnlock is to restore the system tick timer.
+     */
+    VOID   (*tickUnlock)(VOID);
 } LosPmTickTimer;
 
 typedef struct {
-    /* Preparations before the CPU enters low power consumption.
+    /* Preparations before the CPU enters low-power consumption.
      * All modes except normal mode are invoked.
      * Unlocked task scheduling.
      */
@@ -203,10 +215,10 @@ typedef struct {
 
 /**
  * @ingroup los_pm
- * @brief Initialize system low power frame.
+ * @brief Initialize system low-power frame.
  *
  * @par Description:
- * This API is used to initialize the system low power frame.
+ * This API is used to initialize the system low-power frame.
  *
  * @attention None.
  *
@@ -221,10 +233,10 @@ UINT32 OsPmInit(VOID);
 
 /**
  * @ingroup los_pm
- * @brief Whether the low power consumption condition is met.
+ * @brief Whether the low-power consumption condition is met.
  *
  * @par Description:
- * This API is used to check whether low power consumption is met.
+ * This API is used to check whether low-power consumption is met.
  *
  * @attention None.
  *
@@ -302,10 +314,10 @@ VOID LOS_PmWakeSet(VOID);
 
 /**
  * @ingroup los_pm
- * @brief Get the low power mode of the current system.
+ * @brief Get the low-power mode of the current system.
  *
  * @par Description:
- * This API is used to get the low power mode of the current system.
+ * This API is used to get the low-power mode of the current system.
  *
  * @attention None.
  *
@@ -320,14 +332,14 @@ LOS_SysSleepEnum LOS_PmModeGet(VOID);
 
 /**
  * @ingroup los_pm
- * @brief Set low power mode.
+ * @brief Set low-power mode.
  *
  * @par Description:
- * This API is used to set low power mode.
+ * This API is used to set low-power mode.
  *
  * @attention None.
  *
- * @param  mode [IN] low power mode.
+ * @param  mode [IN] low-power mode.
  *
  * @retval error code, LOS_OK means success.
  * @par Dependency:
diff --git a/kernel/src/los_tick.c b/kernel/src/los_tick.c
index afba77c1..4d14083d 100644
--- a/kernel/src/los_tick.c
+++ b/kernel/src/los_tick.c
@@ -64,7 +64,7 @@ LITE_OS_SEC_TEXT STATIC VOID OsUpdateSysTimeBase(VOID)
 
 LITE_OS_SEC_TEXT VOID OsTickTimerBaseReset(UINT64 currTime)
 {
-    LOS_ASSERT(currTime > g_tickTimerBase);
+    LOS_ASSERT(currTime >= g_tickTimerBase);
 
     g_tickTimerBase = currTime;
 }