diff --git a/examples/hello_world/hello_world.c b/examples/hello_world/hello_world.c
index fc07b451..0112b899 100644
--- a/examples/hello_world/hello_world.c
+++ b/examples/hello_world/hello_world.c
@@ -8,18 +8,31 @@ osThreadDef(task1, osPriorityNormal, 1, TASK1_STK_SIZE);
 void task2(void *arg);
 osThreadDef(task2, osPriorityNormal, 1, TASK2_STK_SIZE);
 
+#define TASK3_STK_SIZE          512
+void task3(void *arg);
+
 void task1(void *arg)
 {
-    int count = 1;
+    osThreadId task_dyn_created;
+
+    osThreadDynamicDef(task3, osPriorityNormal, 1, TASK3_STK_SIZE);
+    task_dyn_created = osThreadCreate(osThread(task3), NULL);
+
+    int count = 0;
+
     while (1) {
-        printf("###This is task1, %d\r\n", count++);
+        printf("###I am task1\r\n");
         osDelay(2000);
+
+        if (count++ == 3) {
+            printf("###I am task1, kill the dynamic created task\r\n");
+            osThreadTerminate(task_dyn_created);
+        }
     }
 }
 
 void task2(void *arg)
 {
-    int count = 1;
     while (1) {
 #if TOS_CFG_TASK_STACK_DRAUGHT_DEPTH_DETACT_EN > 0u
         k_err_t rc;
@@ -29,13 +42,22 @@ void task2(void *arg)
         printf("%d  %d\n", rc, depth);
 #endif
 
-        printf("***This is task2, %d\r\n", count++);
+        printf("***I am task2\r\n");
         osDelay(1000);
     }
 }
 
+void task3(void *arg)
+{
+    while (1) {
+        printf("$$$I am task3(dynamic created)\r\n");
+        osDelay(2000);
+    }
+}
+
 void application_entry(void *arg)
 {
     osThreadCreate(osThread(task1), NULL); // Create task1
     osThreadCreate(osThread(task2), NULL); // Create task2
 }
+
diff --git a/kernel/core/include/tos_task.h b/kernel/core/include/tos_task.h
index da773297..68ce4cee 100644
--- a/kernel/core/include/tos_task.h
+++ b/kernel/core/include/tos_task.h
@@ -176,7 +176,6 @@ __API__ k_err_t tos_task_destroy(k_task_t *task);
  * @brief Create a task with a dynamic allocated task handler and stack.
  * create a task with a dynamic allocated task handler and stack.
  *
- * @attention a task created by tos_task_create_dyn, should be destroyed by tos_task_destroy_dyn.
  * @param[out]  task        dynamic allocated task handler.
  * @param[in]   name        name of the task.
  * @param[in]   entry       running entry of the task.
@@ -199,20 +198,6 @@ __API__ k_err_t tos_task_create_dyn(k_task_t **task,
                                                     size_t stk_size,
                                                     k_timeslice_t timeslice);
 
-/**
- * @brief Destroy a dynamic created task.
- * delete a dynamic created task.
- *
- * @attention the API to destroy a dynamic created task.
- *
- * @param[in]   task        pointer to the handler of the task to be deleted.
- *
- * @return  errcode
- * @retval  #K_ERR_TASK_DESTROY_IDLE    attempt to destroy idle task.
- * @retval  #K_ERR_NONE                 return successfully.
- */
-__API__ k_err_t tos_task_destroy_dyn(k_task_t *task);
-
 #endif
 
 /**
diff --git a/kernel/core/tos_task.c b/kernel/core/tos_task.c
index 02401ea7..81c58d0e 100644
--- a/kernel/core/tos_task.c
+++ b/kernel/core/tos_task.c
@@ -184,7 +184,7 @@ __STATIC__ k_err_t task_do_destroy(k_task_t *task)
     return K_ERR_NONE;
 }
 
-__API__ k_err_t tos_task_destroy(k_task_t *task)
+__STATIC__ k_err_t task_destroy_static(k_task_t *task)
 {
     TOS_IN_IRQ_CHECK();
 
@@ -198,7 +198,7 @@ __API__ k_err_t tos_task_destroy(k_task_t *task)
         return K_ERR_SCHED_LOCKED;
     }
 
-#if TOS_CFG_TASK_DYNAMIC_CREATE_EN
+#if TOS_CFG_TASK_DYNAMIC_CREATE_EN > 0u
     if (!knl_object_alloc_is_static(&task->knl_obj)) {
         return K_ERR_OBJ_INVALID_ALLOC_TYPE;
     }
@@ -284,26 +284,10 @@ __API__ k_err_t tos_task_create_dyn(k_task_t **task,
     return K_ERR_NONE;
 }
 
-__API__ k_err_t tos_task_destroy_dyn(k_task_t *task)
+__STATIC__ k_err_t task_destroy_dyn(k_task_t *task)
 {
     k_err_t err;
 
-    TOS_IN_IRQ_CHECK();
-
-    if (unlikely(!task)) {
-        task = k_curr_task;
-    }
-
-    TOS_OBJ_VERIFY(task, KNL_OBJ_TYPE_TASK);
-
-    if (knl_is_self(task) && knl_is_sched_locked()) {
-        return K_ERR_SCHED_LOCKED;
-    }
-
-    if (!knl_object_alloc_is_dynamic(&task->knl_obj)) {
-        return K_ERR_OBJ_INVALID_ALLOC_TYPE;
-    }
-
     tos_knl_sched_lock();
 
     err = task_do_destroy(task);
@@ -327,6 +311,29 @@ __API__ k_err_t tos_task_destroy_dyn(k_task_t *task)
 
 #endif
 
+__API__ k_err_t tos_task_destroy(k_task_t *task)
+{
+    TOS_IN_IRQ_CHECK();
+
+    if (unlikely(!task)) {
+        task = k_curr_task;
+    }
+
+    TOS_OBJ_VERIFY(task, KNL_OBJ_TYPE_TASK);
+
+    if (knl_is_self(task) && knl_is_sched_locked()) {
+        return K_ERR_SCHED_LOCKED;
+    }
+
+#if TOS_CFG_TASK_DYNAMIC_CREATE_EN > 0u
+    if (knl_object_alloc_is_dynamic(&task->knl_obj)) {
+        return task_destroy_dyn(task);
+    }
+#endif
+
+    return task_destroy_static(task);
+}
+
 __API__ void tos_task_yield(void)
 {
     TOS_CPU_CPSR_ALLOC();
diff --git a/osal/cmsis_os/cmsis_os.c b/osal/cmsis_os/cmsis_os.c
index fa329500..3b230ed8 100644
--- a/osal/cmsis_os/cmsis_os.c
+++ b/osal/cmsis_os/cmsis_os.c
@@ -75,9 +75,20 @@ osThreadId osThreadCreate(const osThreadDef_t *thread_def, void *argument)
         return NULL;
     }
 
+#if TOS_CFG_TASK_DYNAMIC_CREATE_EN > 0u
+    if (!thread_def->stackbase && !thread_def->task) {
+        k_task_t *task;
+        err = tos_task_create_dyn(&task, thread_def->name, (k_task_entry_t)thread_def->pthread,
+                                argument, priority_cmsis2knl(thread_def->tpriority),
+                                thread_def->stacksize, thread_def->timeslice);
+        return err == K_ERR_NONE ? task : NULL;
+    }
+#endif
+
     err = tos_task_create((k_task_t *)thread_def->task, thread_def->name, (k_task_entry_t)thread_def->pthread,
                             argument, priority_cmsis2knl(thread_def->tpriority), thread_def->stackbase,
                             thread_def->stacksize, thread_def->timeslice);
+
     return err == K_ERR_NONE ? thread_def->task : NULL;
 }
 
diff --git a/osal/cmsis_os/cmsis_os.h b/osal/cmsis_os/cmsis_os.h
index 333860d2..16c3ffb7 100644
--- a/osal/cmsis_os/cmsis_os.h
+++ b/osal/cmsis_os/cmsis_os.h
@@ -398,12 +398,21 @@ uint32_t osKernelSysTick(void);
 #define osThreadDef(name, priority, instances, stacksz)  \
     extern const osThreadDef_t os_thread_def_##name
 #else                            // define the object
+
 #define osThreadDef(name, priority, instances, stacksz)  \
     k_task_t task_handler_##name; \
     k_stack_t task_stack_##name[(stacksz)]; \
     const osThreadDef_t os_thread_def_##name = \
         { #name, (os_pthread)(name), (osPriority)(priority), (instances), \
         (&((task_stack_##name)[0])), (stacksz), ((k_timeslice_t)0u), (&(task_handler_##name)) }
+
+#if (TOS_CFG_TASK_DYNAMIC_CREATE_EN > 0u)
+#define osThreadDynamicDef(name, priority, instances, stacksz) \
+    const osThreadDef_t os_thread_def_##name = \
+        { #name, (os_pthread)(name), (osPriority)(priority), (instances), \
+        (K_NULL), (stacksz), ((k_timeslice_t)0u), (K_NULL) }
+#endif
+
 #endif
 
 /// Access a Thread definition.