diff --git a/frameworks/native/backup_ext/include/ext_extension.h b/frameworks/native/backup_ext/include/ext_extension.h
index 9469f3df535febe5cb6a37fc07e3cae59b09d4fc..d0cbc4b7422738cb288852d26cae3fafedebb012 100644
--- a/frameworks/native/backup_ext/include/ext_extension.h
+++ b/frameworks/native/backup_ext/include/ext_extension.h
@@ -16,6 +16,7 @@
 #ifndef OHOS_FILEMGMT_BACKUP_BACKUP_EXT_EXTENSION_H
 #define OHOS_FILEMGMT_BACKUP_BACKUP_EXT_EXTENSION_H
 
+#include <shared_mutex>
 #include <string>
 #include <vector>
 
@@ -80,6 +81,7 @@ private:
     void AsyncTaskRestore();
 
 private:
+    std::shared_mutex lock_;
     std::shared_ptr<ExtBackupJs> extension_;
     std::vector<std::string> tars_;
     OHOS::ThreadPool threadPool_;
diff --git a/frameworks/native/backup_ext/src/ext_extension.cpp b/frameworks/native/backup_ext/src/ext_extension.cpp
index 3bb40c76963c0765c6c7110d685327254b3a0504..6cea0bd311034a88726906562bc705ac480ea183 100644
--- a/frameworks/native/backup_ext/src/ext_extension.cpp
+++ b/frameworks/native/backup_ext/src/ext_extension.cpp
@@ -108,7 +108,7 @@ ErrCode BackupExtExtension::HandleClear()
         if (!ForceRemoveDirectory(restoreCache)) {
             HILOGI("Failed to delete the restore cache %{public}s", restoreCache.c_str());
         }
-
+        unique_lock<shared_mutex> lock(lock_);
         tars_.clear();
     } catch (const BError &e) {
         return e.GetCode();
@@ -193,10 +193,13 @@ ErrCode BackupExtExtension::PublishFile(const string &fileName)
 
         string path = string(BConstants::PATH_BUNDLE_BACKUP_HOME).append(BConstants::SA_BUNDLE_BACKUP_RESTORE);
         string tarName = path + fileName;
-        if (find(tars_.begin(), tars_.end(), fileName) != tars_.end() || access(tarName.data(), F_OK) != 0) {
-            return BError(-EPERM);
+        {
+            unique_lock<shared_mutex> lock(lock_);
+            if (find(tars_.begin(), tars_.end(), fileName) != tars_.end() || access(tarName.data(), F_OK) != 0) {
+                return BError(-EPERM);
+            }
+            tars_.push_back(fileName);
         }
-        tars_.push_back(fileName);
 
         // 异步执行解压操作
         if (extension_->AllowToBackupRestore()) {