diff --git a/kernel/include/los_sortlink.h b/kernel/include/los_sortlink.h
index a4b1d2b5..66d0f006 100644
--- a/kernel/include/los_sortlink.h
+++ b/kernel/include/los_sortlink.h
@@ -56,7 +56,10 @@ typedef struct {
 } SortLinkAttribute;
 
 extern SortLinkAttribute g_taskSortLink;
+
+#if (LOSCFG_BASE_CORE_SWTMR == 1)
 extern SortLinkAttribute g_swtmrSortLink;
+#endif
 
 #define OS_SORT_LINK_INVALID_TIME ((UINT64)-1)
 #define SET_SORTLIST_VALUE(sortList, value) (((SortLinkList *)(sortList))->responseTime = (value))
@@ -98,7 +101,11 @@ STATIC INLINE UINT64 GetSortLinkNextExpireTime(SortLinkAttribute *sortHead, UINT
 STATIC INLINE UINT64 OsGetNextExpireTime(UINT64 startTime, UINT32 tickPrecision)
 {
     UINT64 taskExpireTime = GetSortLinkNextExpireTime(&g_taskSortLink, startTime, tickPrecision);
+#if (LOSCFG_BASE_CORE_SWTMR == 1)
     UINT64 swtmrExpireTime = GetSortLinkNextExpireTime(&g_swtmrSortLink, startTime, tickPrecision);
+#else
+    UINT64 swtmrExpireTime = taskExpireTime;
+#endif
     return (taskExpireTime < swtmrExpireTime) ? taskExpireTime : swtmrExpireTime;
 }
 
diff --git a/kernel/include/los_task.h b/kernel/include/los_task.h
index 786f4a31..ce8441df 100644
--- a/kernel/include/los_task.h
+++ b/kernel/include/los_task.h
@@ -1584,7 +1584,9 @@ extern UINT32               g_idleTaskID;
  * Software timer task ID.
  *
  */
+#if (LOSCFG_BASE_CORE_SWTMR == 1)
 extern UINT32               g_swtmrTaskID;
+#endif
 
 /**
  * @ingroup los_task
diff --git a/kernel/src/los_sched.c b/kernel/src/los_sched.c
index aaa33357..cb72e290 100644
--- a/kernel/src/los_sched.c
+++ b/kernel/src/los_sched.c
@@ -509,7 +509,9 @@ VOID OsSchedStart(VOID)
 
     OsTickSysTimerStartTimeSet(newTask->startTime);
 
+#if (LOSCFG_BASE_CORE_SWTMR == 1)
     OsSwtmrResponseTimeReset(newTask->startTime);
+#endif
 
     /* Initialize the schedule timeline and enable scheduling */
     g_taskScheduled = TRUE;
diff --git a/kernel/src/los_sortlink.c b/kernel/src/los_sortlink.c
index 3ef717f3..1cb5132c 100644
--- a/kernel/src/los_sortlink.c
+++ b/kernel/src/los_sortlink.c
@@ -40,7 +40,10 @@ extern "C" {
 #endif /* __cplusplus */
 
 SortLinkAttribute g_taskSortLink;
+
+#if (LOSCFG_BASE_CORE_SWTMR == 1)
 SortLinkAttribute g_swtmrSortLink;
+#endif
 
 UINT32 OsSortLinkInit(SortLinkAttribute *sortLinkHead)
 {
@@ -85,8 +88,10 @@ VOID OsAdd2SortLink(SortLinkList *node, UINT64 startTime, UINT32 waitTicks, Sort
 
     if (type == OS_SORT_LINK_TASK) {
         sortLinkHead = &g_taskSortLink;
+#if (LOSCFG_BASE_CORE_SWTMR == 1)
     } else if (type == OS_SORT_LINK_SWTMR) {
         sortLinkHead = &g_swtmrSortLink;
+#endif
     } else {
         LOS_Panic("Sort link type error : %u\n", type);
     }
@@ -128,18 +133,22 @@ STATIC INLINE VOID SortLinkNodeTimeUpdate(SortLinkAttribute *sortLinkHead, UINT3
 VOID OsSortLinkResponseTimeConvertFreq(UINT32 oldFreq)
 {
     SortLinkAttribute *taskHead = &g_taskSortLink;
-    SortLinkAttribute *swtmrHead = &g_swtmrSortLink;
-
     SortLinkNodeTimeUpdate(taskHead, oldFreq);
+
+#if (LOSCFG_BASE_CORE_SWTMR == 1)
+    SortLinkAttribute *swtmrHead = &g_swtmrSortLink;
     SortLinkNodeTimeUpdate(swtmrHead, oldFreq);
+#endif
 }
 
 SortLinkAttribute *OsGetSortLinkAttribute(SortLinkType type)
 {
     if (type == OS_SORT_LINK_TASK) {
         return &g_taskSortLink;
+#if (LOSCFG_BASE_CORE_SWTMR == 1)
     } else if (type == OS_SORT_LINK_SWTMR) {
         return &g_swtmrSortLink;
+#endif
     }
 
     PRINT_ERR("Invalid sort link type!\n");
diff --git a/kernel/src/los_task.c b/kernel/src/los_task.c
index 5ec570a1..58d836b3 100644
--- a/kernel/src/los_task.c
+++ b/kernel/src/los_task.c
@@ -102,7 +102,11 @@ LITE_OS_SEC_BSS  LosTask                             g_losTask;
 LITE_OS_SEC_BSS  UINT16                              g_losTaskLock;
 LITE_OS_SEC_BSS  UINT32                              g_taskMaxNum;
 LITE_OS_SEC_BSS  UINT32                              g_idleTaskID;
+
+#if (LOSCFG_BASE_CORE_SWTMR == 1)
 LITE_OS_SEC_BSS  UINT32                              g_swtmrTaskID;
+#endif
+
 LITE_OS_SEC_DATA_INIT LOS_DL_LIST                    g_losFreeTask;
 LITE_OS_SEC_DATA_INIT LOS_DL_LIST                    g_taskRecycleList;
 LITE_OS_SEC_BSS  BOOL                                g_taskScheduled = FALSE;
@@ -118,8 +122,10 @@ STATIC_INLINE UINT32 OsCheckTaskIDValid(UINT32 taskID)
     UINT32 ret = LOS_OK;
     if (taskID == g_idleTaskID) {
         ret = LOS_ERRNO_TSK_OPERATE_IDLE;
+#if (LOSCFG_BASE_CORE_SWTMR == 1)
     } else if (taskID == g_swtmrTaskID) {
         ret = LOS_ERRNO_TSK_SUSPEND_SWTMR_NOT_ALLOWED;
+#endif
     } else if (OS_TSK_GET_INDEX(taskID) >= g_taskMaxNum) {
         ret = LOS_ERRNO_TSK_ID_INVALID;
     }
@@ -1212,9 +1218,11 @@ LITE_OS_SEC_TEXT_MINOR UINT32 LOS_TaskPriSet(UINT32 taskID, UINT16 taskPrio)
         return LOS_ERRNO_TSK_OPERATE_IDLE;
     }
 
+#if (LOSCFG_BASE_CORE_SWTMR == 1)
     if (taskID == g_swtmrTaskID) {
         return LOS_ERRNO_TSK_OPERATE_SWTMR;
     }
+#endif
 
     if (OS_CHECK_TSK_PID_NOIDLE(taskID)) {
         return LOS_ERRNO_TSK_ID_INVALID;