diff --git a/python/paddle/incubate/distributed/fleet/fleet_util.py b/python/paddle/incubate/distributed/fleet/fleet_util.py
index 1777afffe9aaf..e0450948e6171 100644
--- a/python/paddle/incubate/distributed/fleet/fleet_util.py
+++ b/python/paddle/incubate/distributed/fleet/fleet_util.py
@@ -1324,7 +1324,8 @@ def get_online_pass_interval(
             and "/" not in days
             and "(" not in days
             and ")" not in days
-        ), r"days should not contain [|,;,\,/,(,)]"
+            and "&" not in days
+        ), r"days should not contain [|,;,\,/,(,),&]"
         days = os.popen("echo -n " + days).read().split(" ")
         assert (
             "|" not in hours
@@ -1332,8 +1333,9 @@ def get_online_pass_interval(
             and "\\" not in hours
             and "/" not in hours
             and "(" not in hours
-            and ")" not in days
-        ), r"hours should not contain [|,;,\,/,(,)]"
+            and ")" not in hours
+            and "&" not in hours
+        ), r"hours should not contain [|,;,\,/,(,),&]"
         hours = os.popen("echo -n " + hours).read().split(" ")
         split_interval = int(split_interval)
         split_per_pass = int(split_per_pass)