diff --git a/components/cplusplus/cxx_mail.h b/components/cplusplus/cxx_mail.h
index ae3bfb5c4134610fa464193a15ce99d96847b4d7..88770bdd9433f6f55793a6242cb055cf29378710 100644
--- a/components/cplusplus/cxx_mail.h
+++ b/components/cplusplus/cxx_mail.h
@@ -51,7 +51,7 @@ public:
         else
             tick = rt_tick_from_millisecond(millisec);
 
-        return rt_mb_send_wait(&mID, (rt_uint32_t)mptr, tick) == RT_EOK;
+        return rt_mb_send_wait(&mID, (rt_ubase_t)mptr, tick) == RT_EOK;
     }
 
     /** Get a mail from a queue.
diff --git a/components/lwp/lwp_mem.c b/components/lwp/lwp_mem.c
index 2063fbb9835c4172f17e666e7ec121a8d4b2f893..fe9de9eb67599e4e0afbf8320bc6364d49ebabc3 100644
--- a/components/lwp/lwp_mem.c
+++ b/components/lwp/lwp_mem.c
@@ -17,7 +17,7 @@
 
 // todo: remove repleat code
 #define RT_MEMHEAP_SIZE         RT_ALIGN(sizeof(struct rt_lwp_memheap_item), RT_ALIGN_SIZE)
-#define MEMITEM_SIZE(item)      ((rt_uint32_t)item->next - (rt_uint32_t)item - RT_MEMHEAP_SIZE)
+#define MEMITEM_SIZE(item)      ((rt_ubase_t)item->next - (rt_ubase_t)item - RT_MEMHEAP_SIZE)
 
 #ifndef LWP_MEM_PAGE_SIZE
     #define LWP_MEM_PAGE_SIZE       (4 * 1024)
diff --git a/components/lwp/lwp_memheap.c b/components/lwp/lwp_memheap.c
index 7516fa0a3063fa4c613d466bd8f0d2e2521fdc5c..9695aab282e5abb89bfcfbdc72f80da0caf4989f 100644
--- a/components/lwp/lwp_memheap.c
+++ b/components/lwp/lwp_memheap.c
@@ -29,7 +29,7 @@
 #define RT_MEMHEAP_MINIALLOC    12
 
 #define RT_MEMHEAP_SIZE         RT_ALIGN(sizeof(struct rt_lwp_memheap_item), RT_ALIGN_SIZE)
-#define MEMITEM_SIZE(item)      ((rt_uint32_t)item->next - (rt_uint32_t)item - RT_MEMHEAP_SIZE)
+#define MEMITEM_SIZE(item)      ((rt_ubase_t)item->next - (rt_ubase_t)item - RT_MEMHEAP_SIZE)
 
 /*
  * The initialized memory pool will be:
diff --git a/components/net/lwip-1.4.1/src/arch/sys_arch.c b/components/net/lwip-1.4.1/src/arch/sys_arch.c
index 3cdb637d1545b7045e818c4e38579ceb2b3e30b7..af2a4b891ec803f07bc5fd5323aa44e40902c567 100644
--- a/components/net/lwip-1.4.1/src/arch/sys_arch.c
+++ b/components/net/lwip-1.4.1/src/arch/sys_arch.c
@@ -450,7 +450,7 @@ void sys_mbox_post(sys_mbox_t *mbox, void *msg)
 {
     RT_DEBUG_NOT_IN_INTERRUPT;
 
-    rt_mb_send_wait(*mbox, (rt_uint32_t)msg, RT_WAITING_FOREVER);
+    rt_mb_send_wait(*mbox, (rt_ubase_t)msg, RT_WAITING_FOREVER);
 
     return;
 }
@@ -462,7 +462,7 @@ void sys_mbox_post(sys_mbox_t *mbox, void *msg)
  */
 err_t sys_mbox_trypost(sys_mbox_t *mbox, void *msg)
 {
-    if (rt_mb_send(*mbox, (rt_uint32_t)msg) == RT_EOK)
+    if (rt_mb_send(*mbox, (rt_ubase_t)msg) == RT_EOK)
         return ERR_OK;
 
     return ERR_MEM;
diff --git a/components/net/lwip-1.4.1/src/netif/ethernetif.c b/components/net/lwip-1.4.1/src/netif/ethernetif.c
index 40cd8fb6ef003058edf0ff965f9b2260c5cac4a3..6bb9eec19f4bca7cab89b29d8061e23dd305999c 100644
--- a/components/net/lwip-1.4.1/src/netif/ethernetif.c
+++ b/components/net/lwip-1.4.1/src/netif/ethernetif.c
@@ -374,7 +374,7 @@ static err_t ethernetif_linkoutput(struct netif *netif, struct pbuf *p)
     /* send a message to eth tx thread */
     msg.netif = netif;
     msg.buf   = p;
-    if (rt_mb_send(&eth_tx_thread_mb, (rt_uint32_t) &msg) == RT_EOK)
+    if (rt_mb_send(&eth_tx_thread_mb, (rt_ubase_t) &msg) == RT_EOK)
     {
         /* waiting for ack */
         rt_sem_take(&(enetif->tx_ack), RT_WAITING_FOREVER);
@@ -556,7 +556,7 @@ rt_err_t eth_device_ready(struct eth_device* dev)
         if(dev->rx_notice == RT_FALSE)
         {
             dev->rx_notice = RT_TRUE;
-            return rt_mb_send(&eth_rx_thread_mb, (rt_uint32_t)dev);
+            return rt_mb_send(&eth_rx_thread_mb, (rt_ubase_t)dev);
         }
         else
             return RT_EOK;
@@ -581,7 +581,7 @@ rt_err_t eth_device_linkchange(struct eth_device* dev, rt_bool_t up)
     rt_hw_interrupt_enable(level);
 
     /* post message to ethernet thread */
-    return rt_mb_send(&eth_rx_thread_mb, (rt_uint32_t)dev);
+    return rt_mb_send(&eth_rx_thread_mb, (rt_ubase_t)dev);
 }
 #else
 /* NOTE: please not use it in interrupt when no RxThread exist */
diff --git a/components/net/lwip-2.0.3/src/netif/ethernetif.c b/components/net/lwip-2.0.3/src/netif/ethernetif.c
index 0b1943fdff0a8c2e3e8cfb5b7bf4ceed85daf657..b278490f16891777d2567f09467c87b07bfee570 100644
--- a/components/net/lwip-2.0.3/src/netif/ethernetif.c
+++ b/components/net/lwip-2.0.3/src/netif/ethernetif.c
@@ -605,7 +605,7 @@ rt_err_t eth_device_ready(struct eth_device* dev)
         if(dev->rx_notice == RT_FALSE)
         {
             dev->rx_notice = RT_TRUE;
-            return rt_mb_send(&eth_rx_thread_mb, (rt_uint32_t)dev);
+            return rt_mb_send(&eth_rx_thread_mb, (rt_ubase_t)dev);
         }
         else
             return RT_EOK;
diff --git a/components/net/lwip-2.1.2/src/arch/sys_arch.c b/components/net/lwip-2.1.2/src/arch/sys_arch.c
index 62dc4930079a60073fbe65438c5ad0c348bc02fd..b0bf76c98a10f696eb4a93862da66afb9551f395 100644
--- a/components/net/lwip-2.1.2/src/arch/sys_arch.c
+++ b/components/net/lwip-2.1.2/src/arch/sys_arch.c
@@ -469,7 +469,7 @@ void sys_mbox_post(sys_mbox_t *mbox, void *msg)
 {
     RT_DEBUG_NOT_IN_INTERRUPT;
 
-    rt_mb_send_wait(*mbox, (rt_uint32_t)msg, RT_WAITING_FOREVER);
+    rt_mb_send_wait(*mbox, (rt_ubase_t)msg, RT_WAITING_FOREVER);
 
     return;
 }
@@ -481,7 +481,7 @@ void sys_mbox_post(sys_mbox_t *mbox, void *msg)
  */
 err_t sys_mbox_trypost(sys_mbox_t *mbox, void *msg)
 {
-    if (rt_mb_send(*mbox, (rt_uint32_t)msg) == RT_EOK)
+    if (rt_mb_send(*mbox, (rt_ubase_t)msg) == RT_EOK)
         return ERR_OK;
 
     return ERR_MEM;
diff --git a/components/net/lwip-2.1.2/src/netif/ethernetif.c b/components/net/lwip-2.1.2/src/netif/ethernetif.c
index 0625ff74b02fd36ed05c9bc9f8c3e3a187e61476..aeb26788694a843bc1e0b356c372a6e6d914596b 100644
--- a/components/net/lwip-2.1.2/src/netif/ethernetif.c
+++ b/components/net/lwip-2.1.2/src/netif/ethernetif.c
@@ -405,7 +405,7 @@ static err_t ethernetif_linkoutput(struct netif *netif, struct pbuf *p)
     msg.netif = netif;
     msg.buf   = p;
     rt_completion_init(&msg.ack);
-    if (rt_mb_send(&eth_tx_thread_mb, (rt_uint32_t) &msg) == RT_EOK)
+    if (rt_mb_send(&eth_tx_thread_mb, (rt_ubase_t) &msg) == RT_EOK)
     {
         /* waiting for ack */
         rt_completion_wait(&msg.ack, RT_WAITING_FOREVER);
@@ -615,7 +615,7 @@ rt_err_t eth_device_ready(struct eth_device* dev)
         if(dev->rx_notice == RT_FALSE)
         {
             dev->rx_notice = RT_TRUE;
-            return rt_mb_send(&eth_rx_thread_mb, (rt_uint32_t)dev);
+            return rt_mb_send(&eth_rx_thread_mb, (rt_ubase_t)dev);
         }
         else
             return RT_EOK;
@@ -640,7 +640,7 @@ rt_err_t eth_device_linkchange(struct eth_device* dev, rt_bool_t up)
     rt_hw_interrupt_enable(level);
 
     /* post message to ethernet thread */
-    return rt_mb_send(&eth_rx_thread_mb, (rt_uint32_t)dev);
+    return rt_mb_send(&eth_rx_thread_mb, (rt_ubase_t)dev);
 }
 #else
 /* NOTE: please not use it in interrupt when no RxThread exist */
diff --git a/examples/utest/testcases/kernel/memheap_tc.c b/examples/utest/testcases/kernel/memheap_tc.c
index ee52bdb1854edf022ed8d032ef1ddc00386d3b39..fe81cd147227294d6241ac25bca331be7e1c5c9a 100644
--- a/examples/utest/testcases/kernel/memheap_tc.c
+++ b/examples/utest/testcases/kernel/memheap_tc.c
@@ -22,12 +22,12 @@
 static void memheap_test(void)
 {
     struct rt_memheap heap1;
-    rt_uint32_t ptr_start;
+    rt_ubase_t ptr_start;
     void *ptr[SLICE_NUM];
     int i, cnt = 0;
 
     /* init heap */
-    ptr_start = (rt_uint32_t)rt_malloc_align(HEAP_SIZE, HEAP_ALIGN);
+    ptr_start = (rt_ubase_t)rt_malloc_align(HEAP_SIZE, HEAP_ALIGN);
     if (ptr_start == RT_NULL)
     {
         rt_kprintf("totle size too big,can not malloc memory!");