diff --git a/services/samgr/native/source/samgr_time_handler.cpp b/services/samgr/native/source/samgr_time_handler.cpp
index d0b97552d9c7e5442d3caa4b6d32b6f701dbafe3..db5ed262c4551b4556236e72e6017ca1c06dc752 100644
--- a/services/samgr/native/source/samgr_time_handler.cpp
+++ b/services/samgr/native/source/samgr_time_handler.cpp
@@ -109,6 +109,10 @@ int SamgrTimeHandler::CreateAndRetry()
 
 bool SamgrTimeHandler::PostTask(TaskType func, uint64_t delayTime)
 {
+    if (!func) {
+        HILOGE("SamgrTimeHandler PostTask failed, func is null");
+        return false;
+    }
     HILOGI("SamgrTimeHandler postTask start: %{public}" PRId64 "s", delayTime);
     int timerfd = CreateAndRetry();
     if (timerfd == -1) {
diff --git a/services/samgr/native/test/unittest/src/device_timed_collect_test.cpp b/services/samgr/native/test/unittest/src/device_timed_collect_test.cpp
index cd3831498602b72b12713daca6f4d461852cfd85..20f84a4acf788c8c5dfb62f4baa7ea99e8466e0b 100644
--- a/services/samgr/native/test/unittest/src/device_timed_collect_test.cpp
+++ b/services/samgr/native/test/unittest/src/device_timed_collect_test.cpp
@@ -21,6 +21,7 @@
 #define private public
 #include "device_status_collect_manager.h"
 #include "device_timed_collect.h"
+#include "samgr_time_handler.h"
 #ifdef PREFERENCES_ENABLE
 #include "preferences_errno.h"
 #include "preferences_helper.h"
@@ -983,4 +984,35 @@ HWTEST_F(DeviceTimedCollectTest, TestFFRTHandlerPostTask003, TestSize.Level3)
     EXPECT_FALSE(collectHandler->PostTask(func, "test", 1));
     DTEST_LOG << " TestFFRTHandlerPostTask003 end" << std::endl;
 }
+
+/**
+ * @tc.name: SamgrTimeHandlerTest001
+ * @tc.desc: test SamgrTimeHandler PostTask, with func is null
+ * @tc.type: FUNC
+ * @tc.require: I7VZ98
+ */
+
+HWTEST_F(DeviceTimedCollectTest, SamgrTimeHandlerTest001, TestSize.Level3)
+{
+    DTEST_LOG << " SamgrTimeHandlerTest001 begin" << std::endl;
+    std::function<void()> timedTask = nullptr;
+    bool bRet = SamgrTimeHandler::GetInstance()->PostTask(timedTask, 1);
+    EXPECT_FALSE(bRet);
+    DTEST_LOG << " SamgrTimeHandlerTest001 end" << std::endl;
+}
+
+/**
+ * @tc.name: SamgrTimeHandlerTest002
+ * @tc.desc: test SamgrTimeHandler PostTask, with func is not null
+ * @tc.type: FUNC
+ * @tc.require: I7VZ98
+ */
+HWTEST_F(DeviceTimedCollectTest, SamgrTimeHandlerTest002, TestSize.Level3)
+{
+    DTEST_LOG << " SamgrTimeHandlerTest002 begin" << std::endl;
+    std::function<void()> timedTask = [] () {};
+    bool bRet = SamgrTimeHandler::GetInstance()->PostTask(timedTask, 1);
+    EXPECT_TRUE(bRet);
+    DTEST_LOG << " SamgrTimeHandlerTest002 end" << std::endl;
+}
 }
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