diff --git a/src/scheduler.c b/src/scheduler.c
index 850c70306d18f06ae20323609e66921024762054..0ced21105e305db4b9123d276c4586b6d06c771b 100644
--- a/src/scheduler.c
+++ b/src/scheduler.c
@@ -265,6 +265,7 @@ void rt_system_scheduler_start(void)
 #endif /*RT_USING_SMP*/
 
     rt_schedule_remove_thread(to_thread);
+    to_thread->stat = RT_THREAD_RUNNING;
 
     /* switch to new thread */
 #ifdef RT_USING_SMP
@@ -311,7 +312,7 @@ void rt_schedule(void)
     int cpu_id;
 
     /* disable interrupt */
-    level = rt_hw_interrupt_disable();
+    level  = rt_hw_interrupt_disable();
 
     cpu_id = rt_hw_cpu_id();
     pcpu   = rt_cpu_index(cpu_id);
@@ -330,7 +331,7 @@ void rt_schedule(void)
         {
             to_thread = _get_highest_priority_thread(&highest_ready_priority);
             current_thread->oncpu = RT_CPU_DETACHED;
-            if ((current_thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_READY)
+            if ((current_thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_RUNNING)
             {
                 if (current_thread->current_priority < highest_ready_priority)
                 {
@@ -350,6 +351,7 @@ void rt_schedule(void)
                 RT_OBJECT_HOOK_CALL(rt_scheduler_hook, (current_thread, to_thread));
 
                 rt_schedule_remove_thread(to_thread);
+                to_thread->stat = RT_THREAD_RUNNING;
 
                 /* switch to new thread */
                 RT_DEBUG_LOG(RT_DEBUG_SCHEDULER,
@@ -414,7 +416,7 @@ void rt_schedule(void)
 
             to_thread = _get_highest_priority_thread(&highest_ready_priority);
 
-            if ((rt_current_thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_READY)
+            if ((rt_current_thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_RUNNING)
             {
                 if (rt_current_thread->current_priority < highest_ready_priority)
                 {
@@ -441,6 +443,7 @@ void rt_schedule(void)
                 }
 
                 rt_schedule_remove_thread(to_thread);
+                to_thread->stat = RT_THREAD_RUNNING;
 
                 /* switch to new thread */
                 RT_DEBUG_LOG(RT_DEBUG_SCHEDULER,
@@ -482,6 +485,7 @@ void rt_schedule(void)
             else
             {
                 rt_schedule_remove_thread(rt_current_thread);
+                rt_current_thread->stat = RT_THREAD_RUNNING;
             }
         }
     }
@@ -531,7 +535,7 @@ void rt_scheduler_do_irq_switch(void *context)
         {
             to_thread = _get_highest_priority_thread(&highest_ready_priority);
             current_thread->oncpu = RT_CPU_DETACHED;
-            if ((current_thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_READY)
+            if ((current_thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_RUNNING)
             {
                 if (current_thread->current_priority < highest_ready_priority)
                 {
@@ -552,6 +556,7 @@ void rt_scheduler_do_irq_switch(void *context)
                 RT_OBJECT_HOOK_CALL(rt_scheduler_hook, (current_thread, to_thread));
 
                 rt_schedule_remove_thread(to_thread);
+                to_thread->stat = RT_THREAD_RUNNING;
 
 #ifdef RT_USING_OVERFLOW_CHECK
                 _rt_scheduler_stack_check(to_thread);
diff --git a/src/thread.c b/src/thread.c
index df9f151834e2f8ccb807155f9f9810573dc56364..b23d2fb6b9b78fdffbbcda941816931743d9bbe6 100644
--- a/src/thread.c
+++ b/src/thread.c
@@ -655,6 +655,7 @@ RTM_EXPORT(rt_thread_control);
  */
 rt_err_t rt_thread_suspend(rt_thread_t thread)
 {
+    register rt_base_t stat;
     register rt_base_t temp;
 
     /* thread check */
@@ -663,22 +664,25 @@ rt_err_t rt_thread_suspend(rt_thread_t thread)
 
     RT_DEBUG_LOG(RT_DEBUG_THREAD, ("thread suspend:  %s\n", thread->name));
 
-    if ((thread->stat & RT_THREAD_STAT_MASK) != RT_THREAD_READY)
+    stat = thread->stat & RT_THREAD_STAT_MASK;
+    if ((stat != RT_THREAD_READY) && (stat != RT_THREAD_RUNNING))
     {
         RT_DEBUG_LOG(RT_DEBUG_THREAD, ("thread suspend: thread disorder, 0x%2x\n",
                                        thread->stat));
-
         return -RT_ERROR;
     }
 
-    RT_ASSERT(thread == rt_thread_self());
-
     /* disable interrupt */
     temp = rt_hw_interrupt_disable();
+    if (stat == RT_THREAD_RUNNING)
+    {
+        /* not suspend running status thread on other core */
+        RT_ASSERT(thread == rt_thread_self());
+    }
 
     /* change thread stat */
-    thread->stat = RT_THREAD_SUSPEND | (thread->stat & ~RT_THREAD_STAT_MASK);
     rt_schedule_remove_thread(thread);
+    thread->stat = RT_THREAD_SUSPEND | (thread->stat & ~RT_THREAD_STAT_MASK);
 
     /* stop thread timer anyway */
     rt_timer_stop(&(thread->thread_timer));
diff --git a/src/timer.c b/src/timer.c
index fd938065dbe03762fc646ec6107ddc440618fdce..3992cf6ff448c53bb912b58bc3a8f7d38a1bfd53 100644
--- a/src/timer.c
+++ b/src/timer.c
@@ -399,7 +399,7 @@ rt_err_t rt_timer_start(rt_timer_t timer)
     if (timer->parent.flag & RT_TIMER_FLAG_SOFT_TIMER)
     {
         /* check whether timer thread is ready */
-        if ((timer_thread.stat & RT_THREAD_STAT_MASK) != RT_THREAD_READY)
+        if ((timer_thread.stat & RT_THREAD_STAT_MASK) == RT_THREAD_SUSPEND)
         {
             /* resume timer thread to check soft timer */
             rt_thread_resume(&timer_thread);