diff --git a/base/include/parcel.h b/base/include/parcel.h
index 881b39e0dcbf8883451ae4b714d5e4088ca08e31..93de8257fe22a1b787fa7feb1d3adb9ea2505d16 100644
--- a/base/include/parcel.h
+++ b/base/include/parcel.h
@@ -52,7 +52,7 @@ public:
 
     inline void ClearBehavior(BehaviorFlag b) const
     {
-        behavior_ &= ~(static_cast<uint8_t>(b));
+        behavior_ &= static_cast<uint8_t>(~b);
     }
 
     inline bool TestBehavior(BehaviorFlag b) const
@@ -320,7 +320,7 @@ private:
 
     inline size_t GetPadSize(size_t size)
     {
-        const int SIZE_OFFSET = 3;
+        const size_t SIZE_OFFSET = 3;
         return (((size + SIZE_OFFSET) & (~SIZE_OFFSET)) - size);
     }
 
diff --git a/base/include/thread_pool.h b/base/include/thread_pool.h
index 66c7907e022bacb4b2defd8a3fe4851df726cc3a..9cb536a54bb1aa310d78e3e8ed5a294dbde072cd 100644
--- a/base/include/thread_pool.h
+++ b/base/include/thread_pool.h
@@ -42,7 +42,7 @@ public:
     uint32_t Start(int threadsNum);
     void Stop();
     void AddTask(const Task& f);
-    void SetMaxTaskNum(int maxSize) { maxTaskNum_ = maxSize; }
+    void SetMaxTaskNum(size_t maxSize) { maxTaskNum_ = maxSize; }
 
     // for testability
     size_t GetMaxTaskNum() const { return maxTaskNum_; }
diff --git a/base/src/event_demultiplexer.cpp b/base/src/event_demultiplexer.cpp
index fb8542a03962ee312ad34b03f6bbdd715994ffc3..fef76d7bfee08014ad1fcd521cfeb5c85b313e43 100644
--- a/base/src/event_demultiplexer.cpp
+++ b/base/src/event_demultiplexer.cpp
@@ -133,7 +133,7 @@ void EventDemultiplexer::Polling(int timeout /* ms */)
     }
 
     for (int idx = 0; idx < nfds; ++idx) {
-        int events = epollEvents[idx].events;
+        uint32_t events = epollEvents[idx].events;
         void* ptr = epollEvents[idx].data.ptr;
         auto handler = reinterpret_cast<EventHandler*>(ptr);
         if (handler != nullptr) {
diff --git a/base/src/parcel.cpp b/base/src/parcel.cpp
index 441a4df2f304048f8265591a94393eefcd345c67..65b15f4ea1ed3e4b463f01753583a98ce433eeb6 100644
--- a/base/src/parcel.cpp
+++ b/base/src/parcel.cpp
@@ -1239,7 +1239,7 @@ bool Parcel::ReadVector(std::vector<T> *val, bool (Parcel::*Read)(T &))
         return false;
     }
 
-    size_t readAbleSize = this->GetReadableBytes();
+    size_t readAbleSize = this->GetReadableBytes() / sizeof(T);
     size_t size = static_cast<size_t>(len);
     if ((size > readAbleSize) || (size > val->max_size())) {
         UTILS_LOGE("Failed to read vector, size = %{public}zu, readAbleSize = %{public}zu", size, readAbleSize);
diff --git a/base/src/refbase.cpp b/base/src/refbase.cpp
index 89a2c70249500867ad09d1ad660e3f0c2973e9c5..9c41cee30047cd63f7eb23a189f39f2c83b92f16 100644
--- a/base/src/refbase.cpp
+++ b/base/src/refbase.cpp
@@ -456,8 +456,8 @@ void RefBase::IncStrongRef(const void *objectId)
         return;
     }
 
-    const int curCount = refs_->IncStrongRefCount(objectId);
     IncWeakRef(objectId);
+    const int curCount = refs_->IncStrongRefCount(objectId);
     if (curCount == INITIAL_PRIMARY_VALUE) {
         OnFirstStrongRef(objectId);
     }
diff --git a/base/src/unicode_ex.cpp b/base/src/unicode_ex.cpp
index 93d35532eb319b7faba5ba5c8f1c3f54cddd6e59..bb737360820aa4c6d37ec0be907fd8137ba40124 100644
--- a/base/src/unicode_ex.cpp
+++ b/base/src/unicode_ex.cpp
@@ -248,7 +248,7 @@ int Utf8ToUtf16Length(const char* str8, size_t str8Len)
     int utf16len = 0;
     while (str8 < str8end) {
         utf16len++;
-        int u8charlen = Utf8CodePointLen(*str8);
+        size_t u8charlen = Utf8CodePointLen(*str8);
         if (str8 + u8charlen - 1 >= str8end) {
             UTILS_LOGE("Get str16 length failed because str8 unicode is illegal!");
             return -1;