diff --git a/DeployDevice/src/func/liteOsUpgrade/liteOsUpgrade_RK3568_app.py b/DeployDevice/src/func/liteOsUpgrade/liteOsUpgrade_RK3568_app.py
index de7ea5e7bdd2fe1cd65d175e0302ff75bfbc3e8e..65c374807ef0a684548445b538e5c7b557cc512b 100644
--- a/DeployDevice/src/func/liteOsUpgrade/liteOsUpgrade_RK3568_app.py
+++ b/DeployDevice/src/func/liteOsUpgrade/liteOsUpgrade_RK3568_app.py
@@ -127,6 +127,7 @@ class liteOsUpgrade_RK3568(BaseApp):
         if os.path.exists(smoke_check_file):
             logger.info("smoke_check.json file exist, return True directly, file path is %s" % smoke_check_file)
             delete_file_lock(lock_file)
+            time.sleep(2)
             return True
         if system_type == "Windows":
             loader_tool_path = os.path.join(scriptpath, "resource", "RK3568_tool", "upgrade_tool.exe")