diff --git a/interfaces/kits/js/src/mod_fs/properties/close_core.cpp b/interfaces/kits/js/src/mod_fs/properties/close_core.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..e93ec88cc24d66651fd543faf198e5a5f926b36f
--- /dev/null
+++ b/interfaces/kits/js/src/mod_fs/properties/close_core.cpp
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "close_core.h"
+
+#include <cstring>
+#include <tuple>
+#include <unistd.h>
+
+#include "file_utils.h"
+#include "filemgmt_libhilog.h"
+
+namespace OHOS::FileManagement::ModuleFileIO {
+using namespace std;
+
+static int32_t CloseFd(int fd)
+{
+    std::unique_ptr<uv_fs_t, decltype(FsUtils::FsReqCleanup) *> close_req = { new uv_fs_t, FsUtils::FsReqCleanup };
+    if (!close_req) {
+        HILOGE("Failed to request heap memory.");
+        return ENOMEM;
+    }
+    int ret = uv_fs_close(nullptr, close_req.get(), fd, nullptr);
+    if (ret < 0) {
+        HILOGE("Failed to close file with ret: %{public}d", ret);
+        return ret;
+    }
+    return ERRNO_NOERR;
+}
+
+static bool ValidFd(const int32_t &fd)
+{
+    if (fd < 0) {
+        HILOGE("Invalid fd");
+        return false;
+    }
+    return true;
+}
+
+FsResult<void> CloseCore::DoClose(const int32_t &fd)
+{
+    if (!ValidFd(fd)) {
+        return FsResult<void>::Error(EINVAL);
+    }
+    auto err = CloseFd(fd);
+    if (err) {
+        FsResult<void>::Error(err);
+    }
+    return FsResult<void>::Success();
+}
+} // namespace OHOS::FileManagement::ModuleFileIO
diff --git a/interfaces/kits/js/src/mod_fs/properties/close_core.h b/interfaces/kits/js/src/mod_fs/properties/close_core.h
new file mode 100644
index 0000000000000000000000000000000000000000..1bbdd1c3194b641e5d26a5f02ca94f479aeaeab8
--- /dev/null
+++ b/interfaces/kits/js/src/mod_fs/properties/close_core.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef INTERFACES_KITS_JS_SRC_MOD_FS_PROPERTIES_CLOSE_CORE_H
+#define INTERFACES_KITS_JS_SRC_MOD_FS_PROPERTIES_CLOSE_CORE_H
+
+#include "filemgmt_libfs.h"
+#include "fs_utils.h"
+#include "fs_result.h"
+
+namespace OHOS::FileManagement::ModuleFileIO {
+
+class CloseCore final {
+public:
+    static FsResult<void> DoClose(const int32_t &fd);
+};
+
+const std::string PROCEDURE_CLOSE_NAME = "FileIOClose";
+} // namespace OHOS::FileManagement::ModuleFileIO
+
+#endif // INTERFACES_KITS_JS_SRC_MOD_FS_PROPERTIES_CLOSE_CORE_H
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