diff --git a/services/source/sourcemanager/src/distributed_input_source_manager.cpp b/services/source/sourcemanager/src/distributed_input_source_manager.cpp
index 9b601bb4c75da507bca81e344ccd29783e322ac5..34a2b86793fd2d6a61232a09a87b46c9c5007db4 100644
--- a/services/source/sourcemanager/src/distributed_input_source_manager.cpp
+++ b/services/source/sourcemanager/src/distributed_input_source_manager.cpp
@@ -271,7 +271,7 @@ int32_t DistributedInputSourceManager::RegisterDistributedHardware(const std::st
     }
     DHLOGI("RegisterDistributedHardware called, deviceId: %{public}s, dhId: %{public}s, parameters: %{public}s",
         GetAnonyString(devId).c_str(), GetAnonyString(dhId).c_str(), SetAnonyId(parameters).c_str());
-    int32_t randNumber = GenRandInt(RAND_NUM_MIN, RAND_NUM_MAX);
+    int32_t randNumber = GetRandomInt32(RAND_NUM_MIN, RAND_NUM_MAX);
     usleep(randNumber * US_PER_MS);
 
     std::lock_guard<std::mutex> lock(regDisHardwareMutex_);
diff --git a/services/state/src/dinput_sink_state.cpp b/services/state/src/dinput_sink_state.cpp
index 747d9f26d5aafeb6807fc0b7289c92ae7a8c25cb..8bf357f70d384bc8ec803c8462daf30ab06940e1 100644
--- a/services/state/src/dinput_sink_state.cpp
+++ b/services/state/src/dinput_sink_state.cpp
@@ -100,7 +100,7 @@ DhIdState DInputSinkState::GetStateByDhid(const std::string &dhId)
 void DInputSinkState::SimulateMouseBtnMouseUpState(const std::string &dhId, const struct RawEvent &event)
 {
     DHLOGI("Sinmulate Mouse BTN_MOUSE UP state to source, dhId: %{public}s", GetAnonyString(dhId).c_str());
-    int32_t scanId = GetRandomInt32();
+    int32_t scanId = GetRandomInt32(0, INT32_MAX);
     RawEvent mscScanEv = { event.when, EV_MSC, MSC_SCAN, scanId, dhId, event.path };
     RawEvent btnMouseUpEv = { event.when, EV_KEY, BTN_MOUSE, KEY_UP_STATE, dhId, event.path };
     RawEvent sycReportEv = { event.when, EV_SYN, SYN_REPORT, 0x0, dhId, event.path };
diff --git a/utils/include/dinput_utils_tool.h b/utils/include/dinput_utils_tool.h
index 2b51b7231cd8cb1bc8a8304ba8311840ca831655..1a9e7ccddfb0c658d18100c0479e99831e22a5a8 100644
--- a/utils/include/dinput_utils_tool.h
+++ b/utils/include/dinput_utils_tool.h
@@ -65,10 +65,9 @@ void ScanInputDevicesPath(const std::string &dirName, std::vector<std::string> &
 void ResetVirtualDevicePressedKeys(const std::vector<std::string> &nodePaths);
 
 std::string GetString(const std::vector<std::string> &vec);
-int32_t GetRandomInt32();
+int32_t GetRandomInt32(int32_t randMin, int32_t randMax);
 std::string JointDhIds(const std::vector<std::string> &dhids);
 std::vector<std::string> SplitDhIdString(const std::string &dhIdsString);
-int32_t GenRandInt(int32_t randMin, int32_t randMax);
 } // namespace DistributedInput
 } // namespace DistributedHardware
 } // namespace OHOS
diff --git a/utils/src/dinput_utils_tool.cpp b/utils/src/dinput_utils_tool.cpp
index 80a318778ac9f495ba6b7f661706b2ee1f80d888..a6e99fa83a377b93bfa2911240857fb66a445bf5 100644
--- a/utils/src/dinput_utils_tool.cpp
+++ b/utils/src/dinput_utils_tool.cpp
@@ -451,11 +451,11 @@ std::string GetString(const std::vector<std::string> &vec)
     return retStr;
 }
 
-int32_t GetRandomInt32()
+int32_t GetRandomInt32(int32_t randMin, int32_t randMax)
 {
     std::default_random_engine engine(time(nullptr));
 
-    std::uniform_int_distribution<int> distribution(0, INT32_MAX);
+    std::uniform_int_distribution<int> distribution(randMin, randMax);
     return distribution(engine);
 }
 
@@ -474,14 +474,6 @@ std::vector<std::string> SplitDhIdString(const std::string &dhIdsString)
     SplitStringToVector(dhIdsString, DHID_SPLIT, dhIdsVec);
     return dhIdsVec;
 }
-
-int32_t GenRandInt(int32_t randMin, int32_t randMax)
-{
-    std::random_device randDevice;
-    std::mt19937 genRand(randDevice());
-    std::uniform_int_distribution<int> disRand(randMin, randMax);
-    return disRand(genRand);
-}
 } // namespace DistributedInput
 } // namespace DistributedHardware
 } // namespace OHOS
\ No newline at end of file