diff --git a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
index af002d949..972d38cf1 100644
--- a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
+++ b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
@@ -1066,7 +1066,7 @@ namespace SqlSugar
         }
         public virtual string NewUid(MethodCallExpressionModel mode)
         {
-            return "  REPLACE(\r\n        REPLACE(\r\n            REPLACE(\r\n                REPLACE(\r\n                    REPLACE(\r\n                        REPLACE(\r\n                            REPLACE(\r\n                                REPLACE(\r\n                                    REPLACE(\r\n                                        REPLACE(\r\n                                            '6C050346-B632-47B4-B29F-9CE39AC22792',\r\n                                            '6', SUBSTRING('0123456789ABCDEF', (FLOOR(RANDOM() * 16)::INTEGER % 16) + 1, 1)\r\n                                        ),\r\n                                        'C', SUBSTRING('0123456789ABCDEF', (FLOOR(RANDOM() * 16)::INTEGER % 16) + 1, 1)\r\n                                    ),\r\n                                    '0', SUBSTRING('0123456789ABCDEF', (FLOOR(RANDOM() * 16)::INTEGER % 16) + 1, 1)\r\n                                ),\r\n                                '5', SUBSTRING('0123456789ABCDEF', (FLOOR(RANDOM() * 16)::INTEGER % 16) + 1, 1)\r\n                            ),\r\n                            '0', SUBSTRING('0123456789ABCDEF', (FLOOR(RANDOM() * 16)::INTEGER % 16) + 1, 1)\r\n                        ),\r\n                        '3', SUBSTRING('0123456789ABCDEF', (FLOOR(RANDOM() * 16)::INTEGER % 16) + 1, 1)\r\n                    ),\r\n                    '4', SUBSTRING('0123456789ABCDEF', (FLOOR(RANDOM() * 16)::INTEGER % 16) + 1, 1)\r\n                ),\r\n                'B', SUBSTRING('0123456789ABCDEF', (FLOOR(RANDOM() * 16)::INTEGER % 16) + 1, 1)\r\n            ),\r\n            '2', SUBSTRING('0123456789ABCDEF', (FLOOR(RANDOM() * 16)::INTEGER % 16) + 1, 1)\r\n        ),\r\n        '9', SUBSTRING('0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ', (FLOOR(RANDOM() * 16)::INTEGER % 16) + 1, 1)\r\n    )   ";
+            return $" uuid_generate_v4() ";
         }
 
     }
diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLQueryBuilder.cs b/Src/Asp.NetCore2/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLQueryBuilder.cs
index 403d9859e..304a380b6 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLQueryBuilder.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLQueryBuilder.cs
@@ -86,6 +86,10 @@ namespace SqlSugar
             {
                 result = result + TranLock;
             }
+            if (result.Contains("uuid_generate_v4()")) 
+            {
+                result=" CREATE EXTENSION IF NOT EXISTS pgcrypto;CREATE EXTENSION IF NOT EXISTS \"uuid-ossp\"; "+ result;
+            }
             return result;
         }