diff --git a/test/fuzztest/security_component/service/preregisterseccompprocessstub_fuzzer/preregisterseccompprocessstub_fuzz.cpp b/test/fuzztest/security_component/service/preregisterseccompprocessstub_fuzzer/preregisterseccompprocessstub_fuzz.cpp
index 2d8d68b257689119fb232b5a93f7a11d9fb3594a..db6d055484d48b42e077e7745f5d755fc6ecca37 100644
--- a/test/fuzztest/security_component/service/preregisterseccompprocessstub_fuzzer/preregisterseccompprocessstub_fuzz.cpp
+++ b/test/fuzztest/security_component/service/preregisterseccompprocessstub_fuzzer/preregisterseccompprocessstub_fuzz.cpp
@@ -43,6 +43,7 @@ static void PreRegisterSecCompProcessStubFuzzTest(const uint8_t *data, size_t si
     if (!input.WriteInterfaceToken(ISecCompService::GetDescriptor())) {
         return;
     }
+    rawData.WriteUint32(1);
     SecCompEnhanceAdapter::EnhanceClientSerialize(rawData, inputData);
     input.WriteUint32(inputData.size);
     input.WriteRawData(inputData.data, inputData.size);
@@ -50,6 +51,8 @@ static void PreRegisterSecCompProcessStubFuzzTest(const uint8_t *data, size_t si
     auto service =
         std::make_shared<SecCompService>(SA_ID_SECURITY_COMPONENT_SERVICE, true);
     service->OnRemoteRequest(code, input, reply, option);
+    service->OnStart();
+    service->OnStop();
 }
 } // namespace OHOS
 
diff --git a/test/fuzztest/security_component/service/unregistersecuritycomponentstub_fuzzer/unregistersecuritycomponentstub_fuzzer.cpp b/test/fuzztest/security_component/service/unregistersecuritycomponentstub_fuzzer/unregistersecuritycomponentstub_fuzzer.cpp
index 4d307c8d750373325e9b7ad2dd838c35321e31ea..e61c0852ccb0f39dce8180e5843c6a40908fb01a 100644
--- a/test/fuzztest/security_component/service/unregistersecuritycomponentstub_fuzzer/unregistersecuritycomponentstub_fuzzer.cpp
+++ b/test/fuzztest/security_component/service/unregistersecuritycomponentstub_fuzzer/unregistersecuritycomponentstub_fuzzer.cpp
@@ -22,7 +22,9 @@
 #include "isec_comp_service.h"
 #include "sec_comp_enhance_adapter.h"
 #include "sec_comp_info.h"
+#define private public
 #include "sec_comp_service.h"
+#undef private
 #include "securec.h"
 #include "token_setproc.h"
 #include "unregistersecuritycomponentstub_fuzzer.h"
@@ -30,56 +32,6 @@
 using namespace OHOS::Security::SecurityComponent;
 using namespace OHOS::Security::AccessToken;
 namespace OHOS {
-static int32_t RegisterSecurityComponentStub(uint32_t type, const std::string& compoInfo)
-{
-    uint32_t code =
-        static_cast<uint32_t>(ISecCompServiceIpcCode::COMMAND_REGISTER_SECURITY_COMPONENT);
-    MessageParcel rawData;
-    MessageParcel input;
-    SecCompRawdata inputData;
-    MessageParcel reply;
-    SecCompRawdata replyData;
-
-    if (!input.WriteInterfaceToken(ISecCompService::GetDescriptor())) {
-        return 0;
-    }
-    if (!rawData.WriteUint32(type)) {
-        return 0;
-    }
-
-    if (!rawData.WriteString(compoInfo)) {
-        return 0;
-    }
-    SecCompEnhanceAdapter::EnhanceClientSerialize(rawData, inputData);
-    input.WriteUint32(inputData.size);
-    input.WriteRawData(inputData.data, inputData.size);
-    MessageOption option(MessageOption::TF_SYNC);
-    auto service =
-        std::make_shared<SecCompService>(SA_ID_SECURITY_COMPONENT_SERVICE, true);
-    service->OnRemoteRequest(code, input, reply, option);
-    if (!reply.ReadUint32(replyData.size)) {
-        return 0;
-    }
-    auto readRawReply = reply.ReadRawData(replyData.size);
-    if (readRawReply == nullptr) {
-        return 0;
-    }
-    int32_t res = replyData.RawDataCpy(readRawReply);
-    if (res != SC_OK) {
-        return 0;
-    }
-    MessageParcel deserializedReply;
-    SecCompEnhanceAdapter::EnhanceClientDeserialize(replyData, deserializedReply);
-    if (!deserializedReply.ReadInt32(res)) {
-        return 0;
-    }
-    int32_t scId = 0;
-    if (!deserializedReply.ReadInt32(scId)) {
-        return 0;
-    }
-    return scId;
-}
-
 static void UnregisterSecurityComponentStubFuzzTest(const uint8_t *data, size_t size)
 {
     uint32_t code = static_cast<uint32_t>(ISecCompServiceIpcCode::COMMAND_UNREGISTER_SECURITY_COMPONENT);
@@ -90,7 +42,12 @@ static void UnregisterSecurityComponentStubFuzzTest(const uint8_t *data, size_t
     CompoRandomGenerator generator(data, size);
     uint32_t type = generator.GetScType();
     std::string compoInfo = generator.GenerateRandomCompoStr(type);
-    int32_t scId = RegisterSecurityComponentStub(type, compoInfo);
+    auto service = std::make_shared<SecCompService>(SA_ID_SECURITY_COMPONENT_SERVICE, true);
+    int32_t scId;
+    int32_t res = service->RegisterSecurityComponentBody(static_cast<SecCompType>(type), compoInfo, scId);
+    if (res != SC_OK) {
+        return;
+    }
     if (!input.WriteInterfaceToken(ISecCompService::GetDescriptor())) {
         return;
     }
@@ -102,7 +59,6 @@ static void UnregisterSecurityComponentStubFuzzTest(const uint8_t *data, size_t
     input.WriteRawData(inputData.data, inputData.size);
 
     MessageOption option(MessageOption::TF_SYNC);
-    auto service = std::make_shared<SecCompService>(SA_ID_SECURITY_COMPONENT_SERVICE, true);
     service->OnRemoteRequest(code, input, reply, option);
 }
 } // namespace OHOS
diff --git a/test/fuzztest/security_component/service/updatesecuritycomponentstub_fuzzer/updatesecuritycomponentstub_fuzzer.cpp b/test/fuzztest/security_component/service/updatesecuritycomponentstub_fuzzer/updatesecuritycomponentstub_fuzzer.cpp
index 29637ce8964864a73b88b8c9207864e6f044e225..512f5a0e4cd66186bb2402d295b5a3d64e35fb43 100644
--- a/test/fuzztest/security_component/service/updatesecuritycomponentstub_fuzzer/updatesecuritycomponentstub_fuzzer.cpp
+++ b/test/fuzztest/security_component/service/updatesecuritycomponentstub_fuzzer/updatesecuritycomponentstub_fuzzer.cpp
@@ -22,7 +22,9 @@
 #include "isec_comp_service.h"
 #include "sec_comp_enhance_adapter.h"
 #include "sec_comp_info.h"
+#define private public
 #include "sec_comp_service.h"
+#undef private
 #include "securec.h"
 #include "token_setproc.h"
 #include "updatesecuritycomponentstub_fuzzer.h"
@@ -30,56 +32,6 @@
 using namespace OHOS::Security::SecurityComponent;
 using namespace OHOS::Security::AccessToken;
 namespace OHOS {
-static int32_t RegisterSecurityComponentStub(uint32_t type, const std::string& compoInfo)
-{
-    uint32_t code =
-        static_cast<uint32_t>(ISecCompServiceIpcCode::COMMAND_REGISTER_SECURITY_COMPONENT);
-    MessageParcel rawData;
-    MessageParcel input;
-    SecCompRawdata inputData;
-    MessageParcel reply;
-    SecCompRawdata replyData;
-
-    if (!input.WriteInterfaceToken(ISecCompService::GetDescriptor())) {
-        return 0;
-    }
-    if (!rawData.WriteUint32(type)) {
-        return 0;
-    }
-
-    if (!rawData.WriteString(compoInfo)) {
-        return 0;
-    }
-    SecCompEnhanceAdapter::EnhanceClientSerialize(rawData, inputData);
-    input.WriteUint32(inputData.size);
-    input.WriteRawData(inputData.data, inputData.size);
-    MessageOption option(MessageOption::TF_SYNC);
-    auto service =
-        std::make_shared<SecCompService>(SA_ID_SECURITY_COMPONENT_SERVICE, true);
-    service->OnRemoteRequest(code, input, reply, option);
-    if (!reply.ReadUint32(replyData.size)) {
-        return 0;
-    }
-    auto readRawReply = reply.ReadRawData(replyData.size);
-    if (readRawReply == nullptr) {
-        return 0;
-    }
-    int32_t res = replyData.RawDataCpy(readRawReply);
-    if (res != SC_OK) {
-        return 0;
-    }
-    MessageParcel deserializedReply;
-    SecCompEnhanceAdapter::EnhanceClientDeserialize(replyData, deserializedReply);
-    if (!deserializedReply.ReadInt32(res)) {
-        return 0;
-    }
-    int32_t scId = 0;
-    if (!deserializedReply.ReadInt32(scId)) {
-        return 0;
-    }
-    return scId;
-}
-
 static void UpdateSecurityComponentStubFuzzTest(const uint8_t *data, size_t size)
 {
     uint32_t code = static_cast<uint32_t>(ISecCompServiceIpcCode::COMMAND_UPDATE_SECURITY_COMPONENT);
@@ -94,7 +46,12 @@ static void UpdateSecurityComponentStubFuzzTest(const uint8_t *data, size_t size
 
     uint32_t type = generator.GetScType();
     std::string compoInfo = generator.GenerateRandomCompoStr(type);
-    int32_t scId = RegisterSecurityComponentStub(type, compoInfo);
+    auto service = std::make_shared<SecCompService>(SA_ID_SECURITY_COMPONENT_SERVICE, true);
+    int32_t scId;
+    int32_t res = service->RegisterSecurityComponentBody(static_cast<SecCompType>(type), compoInfo, scId);
+    if (res != SC_OK) {
+        return;
+    }
     if (!rawData.WriteInt32(scId)) {
         return;
     }
@@ -106,7 +63,6 @@ static void UpdateSecurityComponentStubFuzzTest(const uint8_t *data, size_t size
     input.WriteRawData(inputData.data, inputData.size);
 
     MessageOption option(MessageOption::TF_SYNC);
-    auto service = std::make_shared<SecCompService>(SA_ID_SECURITY_COMPONENT_SERVICE, true);
     service->OnRemoteRequest(code, input, reply, option);
 }
 } // namespace OHOS