diff --git a/sql/engines/mssql.py b/sql/engines/mssql.py
index c670a01cc9..63125ddbaf 100644
--- a/sql/engines/mssql.py
+++ b/sql/engines/mssql.py
@@ -99,9 +99,6 @@ def query_check(self, db_name=None, sql=''):
         if re.search(star_patter, sql_lower) is not None:
             keyword_warning += '禁止使用 * 关键词\n'
             result['has_star'] = True
-        if '+' in sql_lower:
-            keyword_warning += '禁止使用 + 关键词\n'
-            result['bad_query'] = True
         for keyword in banned_keywords:
             pattern = r"(^|,| |=){}( |\(|$)".format(keyword)
             if re.search(pattern, sql_lower) is not None:
diff --git a/sql/engines/oracle.py b/sql/engines/oracle.py
index d324833578..8b1913a25f 100644
--- a/sql/engines/oracle.py
+++ b/sql/engines/oracle.py
@@ -314,9 +314,6 @@ def query_check(self, db_name=None, sql=''):
         if re.search(star_patter, sql_lower) is not None:
             keyword_warning += '禁止使用 * 关键词\n'
             result['has_star'] = True
-        if '+' in sql_lower:
-            keyword_warning += '禁止使用 + 关键词\n'
-            result['bad_query'] = True
         if result.get('bad_query') or result.get('has_star'):
             result['msg'] = keyword_warning
         return result
diff --git a/sql/engines/tests.py b/sql/engines/tests.py
index 5d380866d8..6124c856a7 100644
--- a/sql/engines/tests.py
+++ b/sql/engines/tests.py
@@ -1384,15 +1384,6 @@ def test_query_check_IndexError(self):
         self.assertDictEqual(check_result,
                              {'msg': '没有有效的SQL语句', 'bad_query': True, 'filtered_sql': sql.strip(), 'has_star': False})
 
-    @patch('sql.engines.oracle.OracleEngine.explain_check', return_value={'msg': '', 'rows': 0})
-    def test_query_check_plus(self, _explain_check):
-        sql = "select 100+1 from tb;"
-        new_engine = OracleEngine(instance=self.ins)
-        check_result = new_engine.query_check(db_name='archery', sql=sql)
-        self.assertDictEqual(check_result,
-                             {'msg': '禁止使用 + 关键词\n', 'bad_query': True, 'filtered_sql': sql.strip(';'),
-                              'has_star': False})
-
     def test_filter_sql_with_delimiter(self):
         sql = "select * from xx;"
         new_engine = OracleEngine(instance=self.ins)