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 9498f847940af3c253fe9f8c846724ddde9c5247..8eb89cc5fd7e8d1c705effa17e502913738bf573 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 "stat_ani.h"
 #include "unlink_ani.h"
 #include "rmdir_ani.h"
+#include "truncate_ani.h"
 
 using namespace OHOS::FileManagement::ModuleFileIO::ANI;
 
@@ -58,6 +59,8 @@ static ani_status BindFileFs(ani_vm *vm)
         ani_native_function { "copyFileSync", nullptr, reinterpret_cast<void *>(CopyFileAni::CopyFileSync) },
         ani_native_function { "statSync", nullptr, reinterpret_cast<void *>(StatAni::StatSync) },
         ani_native_function { "rmdirSync", "Lstd/core/String;:V", reinterpret_cast<void *>(RmdirAni::RmdirSync) },
+        ani_native_function { "truncateSync", "Lstd/core/Object;Lstd/core/Long;:V",
+            reinterpret_cast<void*>(TruncateAni::TruncateSync) },
     };
 
     return BindClass(vm, className, functions);
diff --git a/interfaces/kits/js/src/mod_fs/ani/file_fs_class.ets b/interfaces/kits/js/src/mod_fs/ani/file_fs_class.ets
index ba52d3112e3dc794a35ff0a9542cf52d18adf96d..fb2fc0c3c85e46b809b2371b28d7a9ac71803aba 100644
--- a/interfaces/kits/js/src/mod_fs/ani/file_fs_class.ets
+++ b/interfaces/kits/js/src/mod_fs/ani/file_fs_class.ets
@@ -49,6 +49,7 @@ class fileIo {
   static native mkdirSync(path: string, recursion: boolean): int;
   static native moveFileSync(src: String, dest: String, mode?: int): void;
   static native rmdirSync(path: string): void;
+  static native truncateSync(file: string | int, len?: long): void;
 
   static accessSync(path: string, mode?: AccessModeType): boolean {
       return fileIo.doAccessSync(path, mode);
@@ -430,6 +431,18 @@ function rmdirSyncTest() {
   console.println("rmdirSyncTest end")
 }
 
+function truncateSyncTest() {
+  console.println("openSyncTest begin")
+  let file = fileIo.openSync("/data/local/tmp/abc1.txt", 2)
+  console.println(`open file without mode, file.fd=${file.fd}`)
+  console.println("truncateSyncTest abc1.txt begin")
+  fileIo.truncateSync(file.fd, 2)
+  console.println("truncateSyncTest abc1.txt end")
+  console.println("truncateSyncTest abc.txt begin")
+  fileIo.truncateSync("/data/local/tmp/abc.txt", 2)
+  console.println("truncateSyncTest abc.txt end")
+}
+
 function stat_test(file: FileDataType) {
   let stat = fileIo.statSync(file)
   console.info("stat, ino is " + stat.ino);