diff --git a/interfaces/inner_kits/test/fuzztest/distributedhardwarefwkkit_fuzzer/distributedhardwarefwkkit_fuzzer.cpp b/interfaces/inner_kits/test/fuzztest/distributedhardwarefwkkit_fuzzer/distributedhardwarefwkkit_fuzzer.cpp
index ba39bd28739112a2d0e153bf1250181a34080308..8dffe7458959e9d7dda8d22f4ddd593ae7db2023 100644
--- a/interfaces/inner_kits/test/fuzztest/distributedhardwarefwkkit_fuzzer/distributedhardwarefwkkit_fuzzer.cpp
+++ b/interfaces/inner_kits/test/fuzztest/distributedhardwarefwkkit_fuzzer/distributedhardwarefwkkit_fuzzer.cpp
@@ -360,7 +360,7 @@ void OnDHFWKOnLineFuzzTest(const uint8_t *data, size_t size)
 
 void QueryLocalSysSpecFuzzTest(const uint8_t *data, size_t size)
 {
-    if ((data == nullptr) || (size == 0)) {
+    if ((data == nullptr) || (size < sizeof(uint32_t))) {
         return;
     }
 
@@ -372,10 +372,8 @@ void QueryLocalSysSpecFuzzTest(const uint8_t *data, size_t size)
 
 void RegisterDHStatusListenerOneParamFuzzTest(const uint8_t *data, size_t size)
 {
-    if ((data == nullptr) || (size == 0)) {
-        return;
-    }
-
+    (void)data;
+    (void)size;
     DistributedHardwareFwkKit dhfwkKit;
     sptr<IHDSinkStatusListener> listener(new TestHDSinkStatusListener());
     dhfwkKit.RegisterDHStatusListener(listener);
@@ -383,10 +381,8 @@ void RegisterDHStatusListenerOneParamFuzzTest(const uint8_t *data, size_t size)
 
 void UnregisterDHStatusListenerOneParamFuzzTest(const uint8_t *data, size_t size)
 {
-    if ((data == nullptr) || (size == 0)) {
-        return;
-    }
-
+    (void)data;
+    (void)size;
     DistributedHardwareFwkKit dhfwkKit;
     sptr<IHDSinkStatusListener> listener(new TestHDSinkStatusListener());
     dhfwkKit.UnregisterDHStatusListener(listener);
@@ -394,7 +390,7 @@ void UnregisterDHStatusListenerOneParamFuzzTest(const uint8_t *data, size_t size
 
 void IsQueryLocalSysSpecTypeValidFuzzTest(const uint8_t *data, size_t size)
 {
-    if ((data == nullptr) || (size == 0)) {
+    if ((data == nullptr) || (size < sizeof(uint32_t))) {
         return;
     }
 
@@ -405,7 +401,7 @@ void IsQueryLocalSysSpecTypeValidFuzzTest(const uint8_t *data, size_t size)
 
 void RegisterCtlCenterCallbackFuzzTest(const uint8_t *data, size_t size)
 {
-    if ((data == nullptr) || (size == 0)) {
+    if ((data == nullptr) || (size < sizeof(int32_t))) {
         return;
     }
 
diff --git a/interfaces/inner_kits/test/fuzztest/getdhdescriptorscallbackstub_fuzzer/getdhdescriptorscallbackstub_fuzzer.cpp b/interfaces/inner_kits/test/fuzztest/getdhdescriptorscallbackstub_fuzzer/getdhdescriptorscallbackstub_fuzzer.cpp
index 642eef5ea3cf413902da0fb96ec34365b32bfee9..b1d849f03b7b2822a12bcf75d6f86b62f0134ebb 100644
--- a/interfaces/inner_kits/test/fuzztest/getdhdescriptorscallbackstub_fuzzer/getdhdescriptorscallbackstub_fuzzer.cpp
+++ b/interfaces/inner_kits/test/fuzztest/getdhdescriptorscallbackstub_fuzzer/getdhdescriptorscallbackstub_fuzzer.cpp
@@ -48,7 +48,7 @@ void FuzzGetDhDescriptorsCallbackStub::OnError(const std::string &networkId, int
 
 void OnRemoteRequestFuzzTest(const uint8_t *data, size_t size)
 {
-    if ((data == nullptr) || (size < sizeof(uint32_t))) {
+    if ((data == nullptr) || (size < sizeof(uint32_t) + sizeof(uint32_t) + 1)) {
         return;
     }
     MessageParcel parcel;
diff --git a/services/distributedhardwarefwkservice/test/fuzztest/accessmanager_fuzzer/accessmanager_fuzzer.cpp b/services/distributedhardwarefwkservice/test/fuzztest/accessmanager_fuzzer/accessmanager_fuzzer.cpp
index 339cc1632d6b96e185549f4e15348cd3be2e2758..0b2fb6e1473d19dd59f5887d486e6d0af2d0808b 100644
--- a/services/distributedhardwarefwkservice/test/fuzztest/accessmanager_fuzzer/accessmanager_fuzzer.cpp
+++ b/services/distributedhardwarefwkservice/test/fuzztest/accessmanager_fuzzer/accessmanager_fuzzer.cpp
@@ -86,61 +86,51 @@ void OnDeviceChangedFuzzTest(const uint8_t* data, size_t size)
 
 void UnInitFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size > DM_MAX_DEVICE_ID_LEN)) {
-        return;
-    }
-
+    (void)data;
+    (void)size;
     AccessManager::GetInstance()->UnInit();
     usleep(SLEEP_TIME_US);
 }
 
 void UnInitDeviceManagerFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size > DM_MAX_DEVICE_ID_LEN)) {
-        return;
-    }
-
+    (void)data;
+    (void)size;
     AccessManager::GetInstance()->UnInitDeviceManager();
     usleep(SLEEP_TIME_US);
 }
 
 void UnRegisterDevStateCallbackFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size > DM_MAX_DEVICE_ID_LEN)) {
-        return;
-    }
-
+    (void)data;
+    (void)size;
     AccessManager::GetInstance()->UnRegisterDevStateCallback();
     usleep(SLEEP_TIME_US);
 }
 
 void OnRemoteDiedFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size > DM_MAX_DEVICE_ID_LEN)) {
-        return;
-    }
-
+    (void)data;
+    (void)size;
     AccessManager::GetInstance()->OnRemoteDied();
     usleep(SLEEP_TIME_US);
 }
 
 void CheckTrustedDeviceOnlineFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size > DM_MAX_DEVICE_ID_LEN)) {
-        return;
-    }
-
+    (void)data;
+    (void)size;
     AccessManager::GetInstance()->CheckTrustedDeviceOnline();
     usleep(SLEEP_TIME_US);
 }
 
 void DumpFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size > DM_MAX_DEVICE_ID_LEN)) {
+    if ((data == nullptr) || (size == 0)) {
         return;
     }
 
-    std::vector<std::string> argsStr = {reinterpret_cast<const char *>(data)};
+    std::vector<std::string> argsStr;
     std::string result = {reinterpret_cast<const char *>(data)};
     AccessManager::GetInstance()->Dump(argsStr, result);
     usleep(SLEEP_TIME_US);
diff --git a/services/distributedhardwarefwkservice/test/fuzztest/capabilityinfomanager_fuzzer/capabilityinfomanager_fuzzer.cpp b/services/distributedhardwarefwkservice/test/fuzztest/capabilityinfomanager_fuzzer/capabilityinfomanager_fuzzer.cpp
index 4469aea1901a39300b671fa7beffa5275313c7e4..eaf84fe0ba29cf0ec24e49b116e816e26412aa58 100644
--- a/services/distributedhardwarefwkservice/test/fuzztest/capabilityinfomanager_fuzzer/capabilityinfomanager_fuzzer.cpp
+++ b/services/distributedhardwarefwkservice/test/fuzztest/capabilityinfomanager_fuzzer/capabilityinfomanager_fuzzer.cpp
@@ -333,10 +333,8 @@ void CapabilityInfoManagerEventHandlerCtorFuzzTest(const uint8_t* data, size_t s
 
 void GetEventHandlerFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size == 0)) {
-        return;
-    }
-
+    (void)data;
+    (void)size;
     CapabilityInfoManager::GetInstance()->GetEventHandler();
 }
 
@@ -365,11 +363,9 @@ void OnChangeFuzzTest(const uint8_t* data, size_t size)
 
 void GetDataByDHTypeFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size == 0)) {
-        return;
-    }
-
-    DHType dhType = static_cast<DHType>(data[0]);
+    (void)data;
+    (void)size;
+    DHType dhType = DHType::AUDIO;
     std::map<std::string, std::shared_ptr<CapabilityInfo>> capabilityMap;
     CapabilityInfoManager::GetInstance()->GetDataByDHType(dhType, capabilityMap);
 }
diff --git a/services/distributedhardwarefwkservice/test/fuzztest/dhcommtool_fuzzer/dhcommtool_fuzzer.cpp b/services/distributedhardwarefwkservice/test/fuzztest/dhcommtool_fuzzer/dhcommtool_fuzzer.cpp
index ee4a511238edadee1397e51245e7b4b75dbdd794..30223b7ac83c94210a4dcc11fc5b26afc1a9cdca 100644
--- a/services/distributedhardwarefwkservice/test/fuzztest/dhcommtool_fuzzer/dhcommtool_fuzzer.cpp
+++ b/services/distributedhardwarefwkservice/test/fuzztest/dhcommtool_fuzzer/dhcommtool_fuzzer.cpp
@@ -71,27 +71,24 @@ void DhTransportParseAndSaveRemoteDHCapsFuzzTest(const uint8_t* data, size_t siz
 
 void DhTransportInitFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size == 0)) {
-        return;
-    }
+    (void)data;
+    (void)size;
     std::shared_ptr<DHCommTool> dhCommTool = std::make_shared<DHCommTool>();
     dhCommTool->Init();
 }
 
 void DhTransportUnInitFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size == 0)) {
-        return;
-    }
+    (void)data;
+    (void)size;
     std::shared_ptr<DHCommTool> dhCommTool = std::make_shared<DHCommTool>();
     dhCommTool->UnInit();
 }
 
 void DHCommToolEventHandlerCtorFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size == 0)) {
-        return;
-    }
+    (void)data;
+    (void)size;
     auto runner = AppExecFwk::EventRunner::Create(true);
     std::shared_ptr<DHCommTool> commToolPtr;
     DHCommTool::DHCommToolEventHandler handler(runner, commToolPtr);
@@ -116,9 +113,8 @@ void DHCommToolEventHandlerProcessEventFuzzTest(const uint8_t* data, size_t size
 
 void DHCommToolEventHandlerProcessFullCapsRspFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size == 0)) {
-        return;
-    }
+    (void)data;
+    (void)size;
     auto runner = AppExecFwk::EventRunner::Create(true);
     auto commTool = std::make_shared<DHCommTool>();
     DHCommTool::DHCommToolEventHandler handler(runner, commTool);
diff --git a/services/distributedhardwarefwkservice/test/fuzztest/dhtransport_fuzzer/dhtransport_fuzzer.cpp b/services/distributedhardwarefwkservice/test/fuzztest/dhtransport_fuzzer/dhtransport_fuzzer.cpp
index 8c1329d6950f8e3c89059e09b3d558b25ede4405..48714bb884c8327740607374982511b0a3141c61 100644
--- a/services/distributedhardwarefwkservice/test/fuzztest/dhtransport_fuzzer/dhtransport_fuzzer.cpp
+++ b/services/distributedhardwarefwkservice/test/fuzztest/dhtransport_fuzzer/dhtransport_fuzzer.cpp
@@ -203,9 +203,8 @@ void DhTransportOnShutdownFuzzTest(const uint8_t* data, size_t size)
 
 void DhTransportInitFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size < sizeof(int32_t))) {
-        return;
-    }
+    (void)data;
+    (void)size;
     std::shared_ptr<DHCommTool> dhCommTool = std::make_shared<DHCommTool>();
     std::shared_ptr<DHTransport> dhTransportTest = std::make_shared<DHTransport>(dhCommTool);
     dhTransportTest->Init();
@@ -223,9 +222,8 @@ void DhTransportOnBytesFuzzTest(const uint8_t* data, size_t size)
 
 void DhTransportGetDHCommToolPtrFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size < sizeof(int32_t))) {
-        return;
-    }
+    (void)data;
+    (void)size;
     auto ptr = GetDHCommToolPtr();
 }
 }