diff --git a/include/rtdef.h b/include/rtdef.h
index c22c20beee9ec28d55ec6dff65e6859731f04bff..6592c271103f4b1f7f37c1d7d6d629d091ef4cb2 100644
--- a/include/rtdef.h
+++ b/include/rtdef.h
@@ -631,7 +631,6 @@ struct rt_thread
 
     /* priority */
     rt_uint8_t  current_priority;                       /**< current priority */
-    rt_uint8_t  init_priority;                          /**< initialized priority */
 #if RT_THREAD_PRIORITY_MAX > 32
     rt_uint8_t  number;
     rt_uint8_t  high_mask;
diff --git a/src/thread.c b/src/thread.c
index 7913e12f5d02c538ce6eca72c430ba4c4914e843..2f06cedd447c1709095309ba1b33c077095c72c4 100644
--- a/src/thread.c
+++ b/src/thread.c
@@ -28,6 +28,7 @@
  *                             add support for tasks bound to cpu
  * 2021-02-24     Meco Man     rearrange rt_thread_control() - schedule the thread when close it
  * 2021-11-15     THEWON       Remove duplicate work between idle and _thread_exit
+ * 2021-12-27     Meco Man     remove .init_priority
  */
 
 #include <rthw.h>
@@ -138,7 +139,6 @@ static rt_err_t _thread_init(struct rt_thread *thread,
 
     /* priority init */
     RT_ASSERT(priority < RT_THREAD_PRIORITY_MAX);
-    thread->init_priority    = priority;
     thread->current_priority = priority;
 
     thread->number_mask = 0;
@@ -297,9 +297,6 @@ rt_err_t rt_thread_startup(rt_thread_t thread)
     RT_ASSERT((thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_INIT);
     RT_ASSERT(rt_object_get_type((rt_object_t)thread) == RT_Object_Class_Thread);
 
-    /* set current priority to initialize priority */
-    thread->current_priority = thread->init_priority;
-
     /* calculate priority attribute */
 #if RT_THREAD_PRIORITY_MAX > 32
     thread->number      = thread->current_priority >> 3;            /* 5bit */
@@ -310,7 +307,7 @@ rt_err_t rt_thread_startup(rt_thread_t thread)
 #endif /* RT_THREAD_PRIORITY_MAX > 32 */
 
     RT_DEBUG_LOG(RT_DEBUG_THREAD, ("startup a thread:%s with priority:%d\n",
-                                   thread->name, thread->init_priority));
+                                   thread->name, thread->current_priority));
     /* change thread stat */
     thread->stat = RT_THREAD_SUSPEND;
     /* then resume it */