diff --git a/common/include/input_hub.cpp b/common/include/input_hub.cpp
index ec2b3af..7585e7b 100644
--- a/common/include/input_hub.cpp
+++ b/common/include/input_hub.cpp
@@ -588,7 +588,7 @@ std::string InputHub::StringPrintf(const char* format, ...) const
     va_list ap;
     va_start(ap, format);
     std::string result;
-    int ret = vsnprintf_s(space, sizeof(space), sizeof(space) - 1, format, ap);
+    size_t ret = vsnprintf_s(space, sizeof(space), sizeof(space) - 1, format, ap);
     if (ret >= DH_SUCCESS && ret < sizeof(space)) {
         result = space;
     } else {
diff --git a/common/include/white_list_util.cpp b/common/include/white_list_util.cpp
index d424512..8cfc33c 100644
--- a/common/include/white_list_util.cpp
+++ b/common/include/white_list_util.cpp
@@ -189,7 +189,7 @@ void WhiteListUtil::GetCombKeysHash(TYPE_COMBINATION_KEY_VEC combKeys, std::unor
 void WhiteListUtil::GetAllComb(TYPE_COMBINATION_KEY_VEC vecs, WhiteListItemHash hash,
     int32_t targetLen, std::unordered_set<std::string> &hashSets)
 {
-    for (int32_t i = 0; i < vecs.size(); i++) {
+    for (size_t i = 0; i < vecs.size(); i++) {
         TYPE_KEY_CODE_VEC nowVec = vecs[i];
         for (int32_t code : nowVec) {
             WhiteListItemHash newHash = { hash.hash + std::to_string(code), hash.len + 1 };
diff --git a/services/sink/inputcollector/src/distributed_input_collector.cpp b/services/sink/inputcollector/src/distributed_input_collector.cpp
index 8ec7be9..26fb7f3 100644
--- a/services/sink/inputcollector/src/distributed_input_collector.cpp
+++ b/services/sink/inputcollector/src/distributed_input_collector.cpp
@@ -33,7 +33,7 @@
 namespace OHOS {
 namespace DistributedHardware {
 namespace DistributedInput {
-DistributedInputCollector::DistributedInputCollector() : mEventBuffer{0x00}, collectThreadID_(-1),
+DistributedInputCollector::DistributedInputCollector() : mEventBuffer{}, collectThreadID_(-1),
     isCollectingEvents_(false), isStartGetDeviceHandlerThread(false), inputTypes_(0)
 {
     inputHub_ = std::make_unique<InputHub>();