diff --git a/debug/accuracy_tools/api_accuracy_checker/dump/info_dump.py b/debug/accuracy_tools/api_accuracy_checker/dump/info_dump.py
index c71ac649c3e3f78f87c72d551c3a30f72bd08781..e90b1f988bb57005c8c409962fc329e69e3c9f62 100644
--- a/debug/accuracy_tools/api_accuracy_checker/dump/info_dump.py
+++ b/debug/accuracy_tools/api_accuracy_checker/dump/info_dump.py
@@ -2,6 +2,7 @@ import fcntl
 import json
 import os
 import threading
+import multiprocessing
 
 from api_accuracy_checker.dump.api_info import ForwardAPIInfo, BackwardAPIInfo
 from api_accuracy_checker.common.utils import check_file_or_directory_path, initialize_save_path, create_directory
@@ -12,6 +13,7 @@ from api_accuracy_checker.common.config import msCheckerConfig
 from ptdbg_ascend.src.python.ptdbg_ascend.common.file_check_util import FileOpen, FileCheckConst, FileChecker, change_mode
 
 lock = threading.Lock()
+proc_lock = multiprocessing.Lock()
 
 
 def write_api_info_json(api_info):
@@ -36,11 +38,12 @@ def write_api_info_json(api_info):
 
 def write_json(file_path, data, indent=None):
     check_file_or_directory_path(os.path.dirname(file_path), True)
+    proc_lock.acquire()
+    lock.acquire()
     if not os.path.exists(file_path):
         with FileOpen(file_path, 'w') as f:
             f.write("{\n}")
             change_mode(file_path, FileCheckConst.DATA_FILE_AUTHORITY)
-    lock.acquire()
     with FileOpen(file_path, 'a+') as f:
         fcntl.flock(f, fcntl.LOCK_EX)
         try:
@@ -57,6 +60,7 @@ def write_json(file_path, data, indent=None):
         finally:
             fcntl.flock(f, fcntl.LOCK_UN)
             lock.release()
+            proc_lock.release()
 
 
 def initialize_output_json():