diff --git a/interfaces/kits/js/BUILD.gn b/interfaces/kits/js/BUILD.gn
index 9334220be9d28e01972e60ed84bec52d044d4e8a..5f52730dba641a902c6d8d09e6d1d85162e89238 100644
--- a/interfaces/kits/js/BUILD.gn
+++ b/interfaces/kits/js/BUILD.gn
@@ -684,6 +684,7 @@ ohos_shared_library("ani_fs_class") {
     "src/mod_fs/properties/ani/close_ani.cpp",
     "src/mod_fs/properties/ani/copy_file_ani.cpp",
     "src/mod_fs/properties/ani/listfile_ani.cpp",
+    "src/mod_fs/properties/ani/lseek_ani.cpp",
     "src/mod_fs/properties/ani/mkdir_ani.cpp",
     "src/mod_fs/properties/ani/move_ani.cpp",
     "src/mod_fs/properties/ani/open_ani.cpp",
@@ -696,6 +697,7 @@ ohos_shared_library("ani_fs_class") {
     "src/mod_fs/properties/close_core.cpp",
     "src/mod_fs/properties/copy_file_core.cpp",
     "src/mod_fs/properties/listfile_core.cpp",
+    "src/mod_fs/properties/lseek_core.cpp",
     "src/mod_fs/properties/mkdir_core.cpp",
     "src/mod_fs/properties/move_core.cpp",
     "src/mod_fs/properties/open_core.cpp",
diff --git a/interfaces/kits/js/src/mod_fs/ani/bind_function_class.cpp b/interfaces/kits/js/src/mod_fs/ani/bind_function_class.cpp
index 065495c9ade9c4c775ce494fa218d0c382077459..35a732ec8db6224a2f9612021bddf1071cb6d1a6 100644
--- a/interfaces/kits/js/src/mod_fs/ani/bind_function_class.cpp
+++ b/interfaces/kits/js/src/mod_fs/ani/bind_function_class.cpp
@@ -24,6 +24,7 @@
 #include "file_ani.h"
 #include "filemgmt_libhilog.h"
 #include "listfile_ani.h"
+#include "lseek_ani.h"
 #include "mkdir_ani.h"
 #include "move_ani.h"
 #include "open_ani.h"
@@ -77,6 +78,7 @@ static ani_status BindStaticMethods(ani_env *env)
         ani_native_function { "copyFileSync", nullptr, reinterpret_cast<void *>(CopyFileAni::CopyFileSync) },
         ani_native_function { "doAccessSync", nullptr, reinterpret_cast<void *>(AccessAni::AccessSync3) },
         ani_native_function { "listFileSync", nullptr, reinterpret_cast<void *>(ListFileAni::ListFileSync) },
+        ani_native_function { "lseekSync", nullptr, reinterpret_cast<void *>(LseekAni::LseekSync) },
         ani_native_function { "mkdirSync", "Lstd/core/String;:V", reinterpret_cast<void *>(MkdirkAni::MkdirSync0) },
         ani_native_function { "mkdirSync", "Lstd/core/String;Z:V", reinterpret_cast<void *>(MkdirkAni::MkdirSync1) },
         ani_native_function { "moveFileSync", nullptr, reinterpret_cast<void *>(MoveAni::MoveFileSync) },
diff --git a/interfaces/kits/js/src/mod_fs/ani/ets/@ohos.file.fs.ets b/interfaces/kits/js/src/mod_fs/ani/ets/@ohos.file.fs.ets
index 67eb95add30a0cd803f0542ae46c90f870189651..c925e518002e1fcbad06c3d8e6fa5a7c1229bf02 100644
--- a/interfaces/kits/js/src/mod_fs/ani/ets/@ohos.file.fs.ets
+++ b/interfaces/kits/js/src/mod_fs/ani/ets/@ohos.file.fs.ets
@@ -492,6 +492,10 @@ function stat(file: string | number, callback: AsyncCallback<Stat, void>): void
   });
 }
 
+function lseek(fd: number, offset: number, whence?: WhenceType): number {
+  return FileIoImpl.lseekSync(fd, offset, whence);
+}
+
 export interface Filter {
   suffix?: Array<string>;
   displayName?: Array<string>;
@@ -623,6 +627,12 @@ class StatInner implements Stat {
   native isSymbolicLink(): boolean;
 }
 
+enum WhenceType {
+  SEEK_SET = 0,
+  SEEK_CUR = 1,
+  SEEK_END = 2
+}
+
 class FileIoImpl {
 
   static {
@@ -637,6 +647,8 @@ class FileIoImpl {
 
   static native listFileSync(path: string, options?: ListFileOptions): string[];
 
+  static native lseekSync(fd: number, offset: number, whence?: WhenceType): number;
+
   static native mkdirSync(path: string): void;
 
   static native mkdirSync(path: string, recursion: boolean): void;
diff --git a/interfaces/kits/js/src/mod_fs/properties/ani/lseek_ani.cpp b/interfaces/kits/js/src/mod_fs/properties/ani/lseek_ani.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..1d689c696ff61f52234c577d46c741d24b5753c0
--- /dev/null
+++ b/interfaces/kits/js/src/mod_fs/properties/ani/lseek_ani.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 "lseek_ani.h"
+
+#include "error_handler.h"
+#include "filemgmt_libhilog.h"
+#include "lseek_core.h"
+#include "type_converter.h"
+
+namespace OHOS {
+namespace FileManagement {
+namespace ModuleFileIO {
+namespace ANI {
+using namespace std;
+
+optional<SeekPos> ParseSeekPos(const optional<int32_t> &whence)
+{
+    if (!whence.has_value()) {
+        return nullopt;
+    }
+
+    return make_optional(static_cast<SeekPos>(move(whence.value())));
+}
+
+ani_double LseekAni::LseekSync(
+    ani_env *env, [[maybe_unused]] ani_class clazz, ani_double fd, ani_double offset, ani_enum_item whence)
+{
+    auto [succWhence, whenceOp] = TypeConverter::EnumToInt32(env, whence);
+    if (!succWhence) {
+        HILOGE("Invalid whence");
+        ErrorHandler::Throw(env, EINVAL);
+        return -1;
+    }
+    auto pos = ParseSeekPos(whenceOp);
+
+    auto ret = LseekCore::DoLseek(static_cast<int32_t>(fd), static_cast<int64_t>(offset), pos);
+    if (!ret.IsSuccess()) {
+        HILOGE("DoLseek failed!");
+        const FsError &err = ret.GetError();
+        ErrorHandler::Throw(env, err);
+        return -1;
+    }
+
+    return ani_double(static_cast<double>(ret.GetData().value()));
+}
+
+} // namespace ANI
+} // namespace ModuleFileIO
+} // namespace FileManagement
+} // namespace OHOS
\ No newline at end of file
diff --git a/interfaces/kits/js/src/mod_fs/properties/ani/lseek_ani.h b/interfaces/kits/js/src/mod_fs/properties/ani/lseek_ani.h
new file mode 100644
index 0000000000000000000000000000000000000000..5a7995d799ec2ab6d000304f4b4a1d9589a58177
--- /dev/null
+++ b/interfaces/kits/js/src/mod_fs/properties/ani/lseek_ani.h
@@ -0,0 +1,34 @@
+/*
+ * 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_ANI_LSEEK_ANI_H
+#define INTERFACES_KITS_JS_SRC_MOD_FS_PROPERTIES_ANI_LSEEK_ANI_H
+
+#include <ani.h>
+
+namespace OHOS {
+namespace FileManagement {
+namespace ModuleFileIO {
+namespace ANI {
+class LseekAni final {
+public:
+    static ani_double LseekSync(
+        ani_env *env, [[maybe_unused]] ani_class clazz, ani_double fd, ani_double offset, ani_enum_item whence);
+};
+} // namespace ANI
+} // namespace ModuleFileIO
+} // namespace FileManagement
+} // namespace OHOS
+#endif // INTERFACES_KITS_JS_SRC_MOD_FS_PROPERTIES_ANI_LSEEK_ANI_H
\ No newline at end of file
diff --git a/interfaces/kits/js/src/mod_fs/properties/lseek_core.cpp b/interfaces/kits/js/src/mod_fs/properties/lseek_core.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..dfec873c9cf2bea50fb4fb2932408c95ca116a2c
--- /dev/null
+++ b/interfaces/kits/js/src/mod_fs/properties/lseek_core.cpp
@@ -0,0 +1,53 @@
+/*
+ * 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 "lseek_core.h"
+
+#include "filemgmt_libhilog.h"
+
+namespace OHOS {
+namespace FileManagement {
+namespace ModuleFileIO {
+using namespace std;
+
+FsResult<int64_t> LseekCore::DoLseek(const int32_t &fd, const int64_t &offset,
+                                     const optional<SeekPos> &pos)
+{
+    if (fd < 0) {
+        HILOGE("Invalid fd from JS first argument");
+        return FsResult<int64_t>::Error(EINVAL);
+    }
+    
+    SeekPos whence = SeekPos::START;
+    if (pos.has_value()) {
+        if (pos.value() < SeekPos::START || pos.value() > SeekPos::END) {
+            HILOGE("Invalid whence from JS third argument");
+            return FsResult<int64_t>::Error(EINVAL);
+        }
+        whence = pos.value();
+    }
+
+    int64_t ret = ::Lseek(fd, offset, whence);
+    if (ret < 0) {
+        HILOGE("Failed to lseek, error:%{public}d", errno);
+        return FsResult<int64_t>::Error(errno);
+    }
+
+    return FsResult<int64_t>::Success(ret);
+}
+
+} // ModuleFileIO
+} // FileManagement
+} // OHOS
\ No newline at end of file
diff --git a/interfaces/kits/js/src/mod_fs/properties/lseek_core.h b/interfaces/kits/js/src/mod_fs/properties/lseek_core.h
new file mode 100644
index 0000000000000000000000000000000000000000..dd399f652e37dbe23edc17b24be32b74d1f19536
--- /dev/null
+++ b/interfaces/kits/js/src/mod_fs/properties/lseek_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_LSEEK_CORE_H
+#define INTERFACES_KITS_JS_SRC_MOD_FS_PROPERTIES_LSEEK_CORE_H
+
+#include "filemgmt_libfs.h"
+#include "rust_file.h"
+
+namespace OHOS::FileManagement::ModuleFileIO {
+using namespace std;
+
+class LseekCore final {
+public:
+    static FsResult<int64_t> DoLseek(const int32_t &fd, const int64_t &offset,
+                                     const optional<SeekPos> &pos = nullopt);
+};
+
+} // namespace OHOS::FileManagement::ModuleFileIO
+
+#endif // INTERFACES_KITS_JS_SRC_MOD_FS_PROPERTIES_LSEEK_CORE_H
\ No newline at end of file