diff --git a/interfaces/kits/js/src/mod_file/class_file/file_n_exporter.cpp b/interfaces/kits/js/src/mod_file/class_file/file_n_exporter.cpp
index c7db1223aef54b23b679a6ae6491cdfabca543a4..c7a423489b86db89d3f2ba1be4958ffa49026ecb 100644
--- a/interfaces/kits/js/src/mod_file/class_file/file_n_exporter.cpp
+++ b/interfaces/kits/js/src/mod_file/class_file/file_n_exporter.cpp
@@ -244,7 +244,7 @@ bool Rmdirs(const string &path)
 string ConvertUri(string path, string originPath, string originUri)
 {
     if (path.find(originPath) != path.npos) {
-        if (originUri[originUri.length() - 1] == '/') {
+        if (originUri.length() >= 1 && originUri[originUri.length() - 1] == '/') {
             originUri = originUri.substr(0, originUri.length() - 1);
         }
         path.replace(0, originPath.length(), originUri);
diff --git a/interfaces/kits/js/src/mod_fileio/properties/read_text.cpp b/interfaces/kits/js/src/mod_fileio/properties/read_text.cpp
index 79e6b53f5471820cc2fce6b8ce6f8ef48ca396d7..9d683db798202071ba39f9c543a975ae1bf8114f 100644
--- a/interfaces/kits/js/src/mod_fileio/properties/read_text.cpp
+++ b/interfaces/kits/js/src/mod_fileio/properties/read_text.cpp
@@ -99,7 +99,7 @@ napi_value ReadText::Sync(napi_env env, napi_callback_info info)
         return nullptr;
     }
 
-    len = (!hasLen || len > statbf.st_size) ? statbf.st_size : len;
+    len = (!hasLen || len > static_cast<size_t>(statbf.st_size)) ? statbf.st_size : len;
     std::unique_ptr<char[]> readbuf = std::make_unique<char[]>(len + 1);
     if (readbuf == nullptr) {
         UniError(EINVAL).ThrowErr(env, "file is too large");
@@ -146,7 +146,7 @@ static UniError AsyncExec(const std::string &path, std::shared_ptr<AsyncReadText
         return UniError(EINVAL);
     }
 
-    len = (!hasLen || len > statbf.st_size) ? statbf.st_size : len;
+    len = (!hasLen || len > static_cast<size_t>(statbf.st_size)) ? statbf.st_size : len;
     arg->buf = std::make_unique<char[]>(len);
     if (arg->buf == nullptr) {
         return UniError(ENOMEM);
diff --git a/interfaces/kits/js/src/mod_fs/class_watcher/watcher_entity.cpp b/interfaces/kits/js/src/mod_fs/class_watcher/watcher_entity.cpp
index f648026d389162b5d62c4c958a50f7f6d3e22920..fc8293251dbee79ccd8a4efc4b7c5c3737414619 100644
--- a/interfaces/kits/js/src/mod_fs/class_watcher/watcher_entity.cpp
+++ b/interfaces/kits/js/src/mod_fs/class_watcher/watcher_entity.cpp
@@ -172,7 +172,7 @@ void FileWatcher::ReadNotifyEvent(WatcherCallback callback)
     while (index < len) {
         event = reinterpret_cast<inotify_event *>(buf + index);
         NotifyEvent(event, callback);
-        index += sizeof(struct inotify_event) + event->len;
+        index += sizeof(struct inotify_event) + static_cast<int>(event->len);
     }
 }
 
@@ -191,11 +191,11 @@ void FileWatcher::GetNotifyEvent(WatcherCallback callback)
     while (run_) {
         int ret = poll(fds, nfds, -1);
         if (ret > 0) {
-            if (fds[0].revents & POLLNVAL) {
+            if (static_cast<unsigned short>(fds[0].revents) & POLLNVAL) {
                 run_ = false;
                 return;
             }
-            if (fds[1].revents & POLLIN) {
+            if (static_cast<unsigned short>(fds[1].revents) & POLLIN) {
                 ReadNotifyEvent(callback);
             }
         } else if (ret < 0 && errno == EINTR) {
diff --git a/interfaces/kits/js/src/mod_fs/class_watcher/watcher_n_exporter.cpp b/interfaces/kits/js/src/mod_fs/class_watcher/watcher_n_exporter.cpp
index 30f49cf5f93fce107ac5201e719c171790864da4..796540157878ebc99e9a89807bc46fd5a6d38543 100644
--- a/interfaces/kits/js/src/mod_fs/class_watcher/watcher_n_exporter.cpp
+++ b/interfaces/kits/js/src/mod_fs/class_watcher/watcher_n_exporter.cpp
@@ -171,25 +171,27 @@ void WatcherNExporter::WatcherCallback(napi_env env, NRef &callback, const std::
         HILOGE("Failed to get uv event loop");
         return;
     }
-
+    if (!callback) {
+        HILOGE("Failed to parse watcher callback");
+        return;
+    }
     uv_work_t *work = new (std::nothrow) uv_work_t;
     if (work == nullptr) {
         HILOGE("Failed to create uv_work_t pointer");
         return;
     }
 
-    if (!callback) {
-        HILOGE("Failed to parse watcher callback");
-        return;
-    }
-
     JSCallbackContext *callbackContext = new (std::nothrow) JSCallbackContext(callback);
     callbackContext->env_ = env;
     callbackContext->fileName_ = fileName;
     callbackContext->event_ = event;
     callbackContext->cookie_ = cookie;
     work->data = reinterpret_cast<void *>(callbackContext);
-
+    if (work->data == nullptr) {
+        delete callbackContext;
+        delete work;
+        return;
+    }
     int ret = uv_queue_work(
         loop, work, [](uv_work_t *work) {}, reinterpret_cast<uv_after_work_cb>(WatcherCallbackComplete));
     if (ret != 0) {
diff --git a/interfaces/kits/js/src/mod_fs/properties/copy_listener/trans_listener.cpp b/interfaces/kits/js/src/mod_fs/properties/copy_listener/trans_listener.cpp
index 2d6f298001502aad3d1742ac6567c996c61f1029..2ee15ce642588802fbf86370bdc4a573abff9f3f 100644
--- a/interfaces/kits/js/src/mod_fs/properties/copy_listener/trans_listener.cpp
+++ b/interfaces/kits/js/src/mod_fs/properties/copy_listener/trans_listener.cpp
@@ -176,9 +176,10 @@ void TransListener::CallbackComplete(uv_work_t *work, int stat)
         return;
     }
     NVal obj = NVal::CreateObject(env);
-    if (entry->progressSize <= numeric_limits<int64_t>::max() && entry->totalSize <= numeric_limits<int64_t>::max()) {
-        obj.AddProp("processedSize", NVal::CreateInt64(env, entry->progressSize).val_);
-        obj.AddProp("totalSize", NVal::CreateInt64(env, entry->totalSize).val_);
+    if (entry->progressSize <= numeric_limits<int64_t>::max() &&
+        entry->totalSize <= static_cast<uint64_t>(numeric_limits<int64_t>::max())) {
+            obj.AddProp("processedSize", NVal::CreateInt64(env, entry->progressSize).val_);
+            obj.AddProp("totalSize", NVal::CreateInt64(env, entry->totalSize).val_);
     }
 
     napi_value result = nullptr;
diff --git a/interfaces/kits/js/src/mod_fs/properties/prop_n_exporter.cpp b/interfaces/kits/js/src/mod_fs/properties/prop_n_exporter.cpp
index 3d7b0ecae10493f8d6d6688900b5247962d5af22..b6184e366ad50b7bad84f8ba715e9ef7158a51fd 100644
--- a/interfaces/kits/js/src/mod_fs/properties/prop_n_exporter.cpp
+++ b/interfaces/kits/js/src/mod_fs/properties/prop_n_exporter.cpp
@@ -85,7 +85,7 @@ static int GetMode(NVal secondVar, bool *hasMode)
         int mode = 0;
         *hasMode = true;
         tie(succ, mode) = secondVar.ToInt32();
-        if (succ && (mode & 0x06) == mode) {
+        if (succ && (static_cast<unsigned int>(mode) & 0x06) == static_cast<unsigned int>(mode)) {
             return mode;
         }
     }
diff --git a/utils/filemgmt_libn/src/n_async/n_async_work_callback.cpp b/utils/filemgmt_libn/src/n_async/n_async_work_callback.cpp
index 3df058b8546c7bbaf23451aaad86018686188ecc..d74cb0a270f30606450d33996df4941568614cdc 100644
--- a/utils/filemgmt_libn/src/n_async/n_async_work_callback.cpp
+++ b/utils/filemgmt_libn/src/n_async/n_async_work_callback.cpp
@@ -51,7 +51,10 @@ NAsyncWorkCallback::~NAsyncWorkCallback()
         return;
     }
     work->data = static_cast<void *>(ctx_);
-
+    if (work->data == nullptr) {
+        HILOGE("Failed to allocate memory for uv_work_t data");
+        return;
+    }
     int ret = uv_queue_work(
         loop, work.get(), [](uv_work_t *work) {},
         [](uv_work_t *work, int status) {