diff --git a/mindspore/_checkparam.py b/mindspore/_checkparam.py
index 343bda2103a..b0ca0771565 100644
--- a/mindspore/_checkparam.py
+++ b/mindspore/_checkparam.py
@@ -441,12 +441,12 @@ class Validator:
             reg = r"^\w+[0-9a-zA-Z\_\.]*$"
         if re.match(reg, target, flag) is None:
             prim_name = f'in `{prim_name}`' if prim_name else ""
-            raise ValueError("'{}' {} is illegal, it should be match regular'{}' by flags'{}'".format(
+            raise ValueError("'{}' {} is illegal, it should be match regular'{}' by flags'{}.'".format(
                 target, prim_name, reg, flag))
         return True
 
     @staticmethod
-    def check_file_name_by_regular(target, reg=None, flag=re.ASCII, prim_name=None):
+    def check_file_name_by_regular(target, reg=None, prim_name=None):
         """Check whether file name is legitimate."""
         if not isinstance(target, str):
             raise ValueError("Args file_name {} must be string, please check it".format(target))
@@ -454,10 +454,10 @@ class Validator:
             raise ValueError("File name cannot be a directory path.")
         if reg is None:
             reg = r"^[0-9a-zA-Z\_\-\.\:\/\\]+$"
-        if re.match(reg, target, flag) is None:
+        if re.match(reg, target) is None:
             prim_name = f'in `{prim_name}`' if prim_name else ""
-            raise ValueError("'{}' {} is illegal, it should be match regular'{}' by flags'{}'".format(
-                target, prim_name, reg, flag))
+            raise ValueError("'{}' {} is illegal, it should be match regular'{}'.".format(
+                target, prim_name, reg))
 
         return True