diff --git a/kal/posix/include/limits.h b/kal/posix/include/limits.h
index b71daa354bb5d27b31d4f5b9ec04d99e6baa7068..f77e3ed097838aae86875716c0b745573c33ad3d 100644
--- a/kal/posix/include/limits.h
+++ b/kal/posix/include/limits.h
@@ -1,6 +1,8 @@
 #ifndef _LIMITS_H
 #define _LIMITS_H
 
+#include "los_config.h"
+
 #ifdef __ICCARM__ /* for iar */
 #define PATH_MAX 256
 #define MQ_PRIO_MAX 1
@@ -73,9 +75,9 @@
 #define PTHREAD_KEYS_MAX 128
 #define PTHREAD_STACK_MIN LOSCFG_BASE_CORE_TSK_MIN_STACK_SIZE
 #define PTHREAD_DESTRUCTOR_ITERATIONS 4
-#define SEM_VALUE_MAX 0x7fffffff
-#define SEM_NSEMS_MAX 256
-#define DELAYTIMER_MAX 0x7fffffff
+#define SEM_VALUE_MAX OS_SEM_COUNTING_MAX_COUNT
+#define SEM_NSEMS_MAX LOSCFG_BASE_IPC_SEM_LIMIT
+#define DELAYTIMER_MAX 32
 #define MQ_PRIO_MAX 1
 #define LOGIN_NAME_MAX 256
 
diff --git a/kernel/include/los_config.h b/kernel/include/los_config.h
index a4820a288e66ec3756d5f1c367a270d96bf3720a..d3909f7fe1c0cb607a128d29389e605ad1a3eed5 100755
--- a/kernel/include/los_config.h
+++ b/kernel/include/los_config.h
@@ -268,6 +268,14 @@ extern "C" {
 #define LOSCFG_BASE_IPC_SEM_LIMIT                           6
 #endif
 
+/**
+ * @ingroup los_config
+ * Maximum number of semaphores.
+ */
+#ifndef OS_SEM_COUNTING_MAX_COUNT
+#define OS_SEM_COUNTING_MAX_COUNT                           0xFFFF
+#endif
+
 /* =============================================================================
                                        Mutex module configuration
 ============================================================================= */
diff --git a/kernel/include/los_sem.h b/kernel/include/los_sem.h
index ebe148cbcd7109a46a7d90cd1dc567934c7ff2ee..3aadeef3836f0fb8bb4d8c4677dbc6c6433501e6 100644
--- a/kernel/include/los_sem.h
+++ b/kernel/include/los_sem.h
@@ -285,11 +285,6 @@ extern UINT32 LOS_SemPend(UINT32 semHandle, UINT32 timeout);
  */
 extern UINT32 LOS_SemPost(UINT32 semHandle);
 
-enum LosSemMaxCount {
-    OS_SEM_COUNTING_MAX_COUNT = 0xFFFF, /**< Max count of counting semaphores */
-    OS_SEM_BINARY_MAX_COUNT = 1         /**< Max count of binary semaphores */
-};
-
 /**
  * @ingroup los_sem
  * Semaphore control structure.
@@ -302,24 +297,30 @@ typedef struct {
     LOS_DL_LIST semList; /**< Queue of tasks that are waiting on a semaphore */
 } LosSemCB;
 
+/**
+ * @ingroup los_config
+ * Max count of binary semaphores.
+ */
+#define OS_SEM_BINARY_MAX_COUNT     1
+
 /**
  * @ingroup los_sem
  * The semaphore is not in use.
- *
  */
-#define OS_SEM_UNUSED 0
+#define OS_SEM_UNUSED               0
+
 /**
  * @ingroup los_sem
  * The semaphore is used.
- *
  */
-#define OS_SEM_USED   1
+#define OS_SEM_USED                 1
+
 /**
  * @ingroup los_sem
  * Obtain the head node in a semaphore doubly linked list.
- *
  */
 #define GET_SEM_LIST(ptr) LOS_DL_LIST_ENTRY(ptr, LosSemCB, semList)
+
 extern LosSemCB *g_allSem;
 /**
  * @ingroup los_sem