diff --git a/interfaces/kits/js/src/mod_fileio/class_randomaccessfile/randomaccessfile_n_exporter.cpp b/interfaces/kits/js/src/mod_fileio/class_randomaccessfile/randomaccessfile_n_exporter.cpp
index 74098271a104a5a8259f56d71d4edf67d59cf05d..97f1167371189532d5c06e32b79dc68d4eb01adf 100644
--- a/interfaces/kits/js/src/mod_fileio/class_randomaccessfile/randomaccessfile_n_exporter.cpp
+++ b/interfaces/kits/js/src/mod_fileio/class_randomaccessfile/randomaccessfile_n_exporter.cpp
@@ -174,7 +174,7 @@ napi_value RandomAccessFileNExporter::ReadSync(napi_env env, napi_callback_info
         UniError(EINVAL).ThrowErr(env, "Invalid buffer/options");
         return nullptr;
     }
-    ssize_t actLen = DoReadRAF(env, buf, len, rafEntity->fd_.get()->GetFD(), rafEntity->fpointer + pos);
+    size_t actLen = DoReadRAF(env, buf, len, rafEntity->fd_.get()->GetFD(), rafEntity->fpointer + pos);
     if (actLen < 0) {
         UniError(errno).ThrowErr(env);
         return nullptr;
@@ -184,7 +184,7 @@ napi_value RandomAccessFileNExporter::ReadSync(napi_env env, napi_callback_info
 }
 
 struct AsyncIOReadArg {
-    ssize_t lenRead { 0 };
+    size_t lenRead { 0 };
     int offset { 0 };
     NRef refReadBuf;
 
@@ -212,7 +212,7 @@ static napi_value ReadExec(napi_env env, NFuncArg &funcArg)
 
     auto arg = make_shared<AsyncIOReadArg>(NVal(env, funcArg[NARG_POS::FIRST]));
     auto cbExec = [arg, buf, len, hasPos, pos, offset, rafEntity](napi_env env) -> UniError {
-        ssize_t actLen = DoReadRAF(env, buf, len, rafEntity->fd_.get()->GetFD(), rafEntity->fpointer + pos);
+        size_t actLen = DoReadRAF(env, buf, len, rafEntity->fd_.get()->GetFD(), rafEntity->fpointer + pos);
         if (actLen < 0) {
             return UniError(errno);
         }
diff --git a/interfaces/kits/js/src/mod_fs/common_func.cpp b/interfaces/kits/js/src/mod_fs/common_func.cpp
index 575f6ecc55c543f592e61d7b605da80950aba2ad..eb115c60c3c8050f788e07314b6176192335579a 100644
--- a/interfaces/kits/js/src/mod_fs/common_func.cpp
+++ b/interfaces/kits/js/src/mod_fs/common_func.cpp
@@ -96,21 +96,21 @@ static tuple<bool, size_t> GetActualLen(napi_env env, int64_t bufLen, int64_t bu
     return { true, retLen };
 }
 
-int CommonFunc::ConvertJsFlags(int &flags)
+unsigned int CommonFunc::ConvertJsFlags(unsigned int &flags)
 {
-    static constexpr int USR_O_RDONLY = 00;
-    static constexpr int USR_O_WRONLY = 01;
-    static constexpr int USR_O_RDWR = 02;
-    static constexpr int USR_O_CREAT = 0100;
-    static constexpr int USR_O_EXCL = 0200;
-    static constexpr int USR_O_TRUNC = 01000;
-    static constexpr int USR_O_APPEND = 02000;
-    static constexpr int USR_O_NONBLOCK = 04000;
-    static constexpr int USR_O_DIRECTORY = 0200000;
-    static constexpr int USR_O_NOFOLLOW = 0400000;
-    static constexpr int USR_O_SYNC = 04010000;
+    static constexpr unsigned int USR_O_RDONLY = 00;
+    static constexpr unsigned int USR_O_WRONLY = 01;
+    static constexpr unsigned int USR_O_RDWR = 02;
+    static constexpr unsigned int USR_O_CREAT = 0100;
+    static constexpr unsigned int USR_O_EXCL = 0200;
+    static constexpr unsigned int USR_O_TRUNC = 01000;
+    static constexpr unsigned int USR_O_APPEND = 02000;
+    static constexpr unsigned int USR_O_NONBLOCK = 04000;
+    static constexpr unsigned int USR_O_DIRECTORY = 0200000;
+    static constexpr unsigned int USR_O_NOFOLLOW = 0400000;
+    static constexpr unsigned int USR_O_SYNC = 04010000;
 
-    int flagsABI = 0;
+    unsigned int flagsABI = 0;
     flagsABI |= ((flags & USR_O_RDONLY) == USR_O_RDONLY) ? O_RDONLY : 0;
     flagsABI |= ((flags & USR_O_WRONLY) == USR_O_WRONLY) ? O_WRONLY : 0;
     flagsABI |= ((flags & USR_O_RDWR) == USR_O_RDWR) ? O_RDWR : 0;
@@ -175,7 +175,7 @@ void CommonFunc::fs_req_cleanup(uv_fs_t* req)
     }
 }
 
-string CommonFunc::GetModeFromFlags(int flags)
+string CommonFunc::GetModeFromFlags(unsigned int flags)
 {
     const string RDONLY = "r";
     const string WRONLY = "w";
diff --git a/interfaces/kits/js/src/mod_fs/common_func.h b/interfaces/kits/js/src/mod_fs/common_func.h
index 1fe648de49265e3d616b4932da95254eb6a149d8..aba4d6e9c7767e302291b1e81b9649264ff2366a 100644
--- a/interfaces/kits/js/src/mod_fs/common_func.h
+++ b/interfaces/kits/js/src/mod_fs/common_func.h
@@ -45,7 +45,7 @@ struct FileInfo {
 void InitOpenMode(napi_env env, napi_value exports);
 
 struct CommonFunc {
-    static int ConvertJsFlags(int &flags);
+    static unsigned int ConvertJsFlags(unsigned int &flags);
     static LibN::NVal InstantiateStat(napi_env env, struct stat &buf);
     static LibN::NVal InstantiateStream(napi_env env, std::unique_ptr<FILE, decltype(&fclose)> fp);
     static std::tuple<bool, void *, int64_t, bool, int64_t> GetReadArg(napi_env env,
@@ -58,7 +58,7 @@ struct CommonFunc {
                                                                                              napi_value srcPath,
                                                                                              napi_value dstPath);
     static void fs_req_cleanup(uv_fs_t* req);
-    static std::string GetModeFromFlags(int flags);
+    static std::string GetModeFromFlags(unsigned int flags);
 };
 } // namespace ModuleFileIO
 } // namespace FileManagement
diff --git a/interfaces/kits/js/src/mod_fs/properties/open.cpp b/interfaces/kits/js/src/mod_fs/properties/open.cpp
index bb9aa36fb8e34877828e2074413485cc38a6b04b..4d337d9a37cd46f9f1fa8f68855232c449b51597 100644
--- a/interfaces/kits/js/src/mod_fs/properties/open.cpp
+++ b/interfaces/kits/js/src/mod_fs/properties/open.cpp
@@ -33,13 +33,13 @@ namespace ModuleFileIO {
 using namespace std;
 using namespace OHOS::FileManagement::LibN;
 
-static tuple<bool, int> GetJsFlags(napi_env env, const NFuncArg &funcArg)
+static tuple<bool, unsigned int> GetJsFlags(napi_env env, const NFuncArg &funcArg)
 {
-    int mode = O_RDONLY;
+    unsigned int mode = O_RDONLY;
     bool succ = false;
     if (funcArg.GetArgc() >= NARG_CNT::TWO && NVal(env, funcArg[NARG_POS::SECOND]).TypeIs(napi_number)) {
         tie(succ, mode) = NVal(env, funcArg[NARG_POS::SECOND]).ToInt32();
-        int invalidMode = (O_WRONLY | O_RDWR);
+        unsigned int invalidMode = (O_WRONLY | O_RDWR);
         if (!succ || ((mode & invalidMode) == invalidMode)) {
             HILOGE("Invalid mode");
             NError(EINVAL).ThrowErr(env);
@@ -77,7 +77,7 @@ static NVal InstantiateFile(napi_env env, int fd, string pathOrUri, bool isUri)
     return { env, objFile };
 }
 
-static int OpenFileByDatashare(napi_env env, napi_value argv, string path, int flags)
+static int OpenFileByDatashare(napi_env env, napi_value argv, string path, unsigned int flags)
 {
     std::shared_ptr<DataShare::DataShareHelper> dataShareHelper = nullptr;
     int fd = -1;