diff --git a/kernel/src/los_task.c b/kernel/src/los_task.c
index 1deca6c5..1b406c87 100644
--- a/kernel/src/los_task.c
+++ b/kernel/src/los_task.c
@@ -1030,6 +1030,11 @@ LITE_OS_SEC_TEXT_INIT UINT32 LOS_TaskDetach(UINT32 taskID)
         return LOS_ERRNO_TSK_NOT_CREATED;
     }
 
+    if (taskCB->taskStatus & OS_TASK_STATUS_EXIT) {
+        LOS_IntRestore(intSave);
+        return LOS_TaskJoin(taskID, NULL);
+    }
+
     ret = OsTaskSetDetachUnsafe(taskCB);
     LOS_IntRestore(intSave);
     return ret;
diff --git a/testsuits/sample/kernel/task/BUILD.gn b/testsuits/sample/kernel/task/BUILD.gn
index fa3d32f9..ca87dd90 100644
--- a/testsuits/sample/kernel/task/BUILD.gn
+++ b/testsuits/sample/kernel/task/BUILD.gn
@@ -149,6 +149,7 @@ static_library("test_task") {
     "It_los_task_120.c",
     "It_los_task_121.c",
     "It_los_task_122.c",
+    "It_los_task_123.c",
   ]
 
   configs += [ "//kernel/liteos_m/testsuits:include" ]
diff --git a/testsuits/sample/kernel/task/It_los_task.c b/testsuits/sample/kernel/task/It_los_task.c
index 8a7b8783..df85478b 100644
--- a/testsuits/sample/kernel/task/It_los_task.c
+++ b/testsuits/sample/kernel/task/It_los_task.c
@@ -122,6 +122,7 @@ VOID ItSuiteLosTask()
     ItLosTask120();
     ItLosTask121();
     ItLosTask122();
+    ItLosTask123();
 
 #if (LOS_KERNEL_TEST_FULL == 1)
     ItLosTask039();
diff --git a/testsuits/sample/kernel/task/It_los_task.h b/testsuits/sample/kernel/task/It_los_task.h
index b4fd5aae..1e072d2e 100644
--- a/testsuits/sample/kernel/task/It_los_task.h
+++ b/testsuits/sample/kernel/task/It_los_task.h
@@ -184,6 +184,7 @@ extern VOID ItLosTask119(VOID);
 extern VOID ItLosTask120(VOID);
 extern VOID ItLosTask121(VOID);
 extern VOID ItLosTask122(VOID);
+extern VOID ItLosTask123(VOID);
 
 #ifdef __cplusplus
 #if __cplusplus
diff --git a/testsuits/sample/kernel/task/It_los_task_118.c b/testsuits/sample/kernel/task/It_los_task_118.c
index 46d0db7f..79f04c83 100644
--- a/testsuits/sample/kernel/task/It_los_task_118.c
+++ b/testsuits/sample/kernel/task/It_los_task_118.c
@@ -60,6 +60,9 @@ static UINT32 TestCase(VOID)
     ICUNIT_ASSERT_EQUAL(ret, 0, ret);
     ICUNIT_ASSERT_EQUAL(uwtemp, 9, uwtemp); /* 8: pthread exit code */
 
+    ret = LOS_TaskDelete(taskID);
+    ICUNIT_ASSERT_EQUAL(ret, LOS_ERRNO_TSK_NOT_CREATED, ret);
+
     return LOS_OK;
 }
 
diff --git a/testsuits/sample/kernel/task/It_los_task_119.c b/testsuits/sample/kernel/task/It_los_task_119.c
index ea6e30f7..b3c4dd32 100644
--- a/testsuits/sample/kernel/task/It_los_task_119.c
+++ b/testsuits/sample/kernel/task/It_los_task_119.c
@@ -62,6 +62,9 @@ static UINT32 TestCase(VOID)
 
     ICUNIT_ASSERT_EQUAL(g_testCount, 1, g_testCount);
 
+    ret = LOS_TaskDelete(taskID);
+    ICUNIT_ASSERT_EQUAL(ret, LOS_ERRNO_TSK_NOT_CREATED, ret);
+
     return LOS_OK;
 }
 
diff --git a/testsuits/sample/kernel/task/It_los_task_123.c b/testsuits/sample/kernel/task/It_los_task_123.c
new file mode 100644
index 00000000..edb9aa68
--- /dev/null
+++ b/testsuits/sample/kernel/task/It_los_task_123.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2021-2021 Huawei Device Co., Ltd. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this list of
+ * conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice, this list
+ * of conditions and the following disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "osTest.h"
+#include "It_los_task.h"
+
+static VOID *TaskDeatchf01(void *argument)
+{
+    g_testCount++;
+    return NULL;
+}
+
+static UINT32 TestCase(VOID)
+{
+    UINT32 ret;
+    UINT32 taskID;
+    TSK_INIT_PARAM_S osTaskInitParam = { 0 };
+
+    g_testCount = 0;
+
+    osTaskInitParam.pfnTaskEntry = (TSK_ENTRY_FUNC)TaskDeatchf01;
+    osTaskInitParam.uwStackSize = OS_TSK_TEST_STACK_SIZE;
+    osTaskInitParam.pcName = "deatch";
+    osTaskInitParam.usTaskPrio = TASK_PRIO_TEST - 5; /* 5: Relatively high priority */
+    osTaskInitParam.uwResved = LOS_TASK_ATTR_JOINABLE;
+
+    ret = LOS_TaskCreate(&taskID, &osTaskInitParam);
+    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+
+    ICUNIT_ASSERT_EQUAL(g_testCount, 1, g_testCount);
+
+    ret = LOS_TaskDetach(taskID);
+    ICUNIT_ASSERT_EQUAL(ret, LOS_OK, ret);
+
+    ret = LOS_TaskDelete(taskID);
+    ICUNIT_ASSERT_EQUAL(ret, LOS_ERRNO_TSK_NOT_CREATED, ret);
+    return LOS_OK;
+}
+
+VOID ItLosTask123(VOID) // IT_Layer_ModuleORFeature_No
+{
+    TEST_ADD_CASE("ItLosTask123", TestCase, TEST_LOS, TEST_TASK, TEST_LEVEL0, TEST_FUNCTION);
+}
+