diff --git a/Src/Asp.Net/PgSqlTest/UnitTest/UCodeFirst.cs b/Src/Asp.Net/PgSqlTest/UnitTest/UCodeFirst.cs
index 883cabf11..02ac1b567 100644
--- a/Src/Asp.Net/PgSqlTest/UnitTest/UCodeFirst.cs
+++ b/Src/Asp.Net/PgSqlTest/UnitTest/UCodeFirst.cs
@@ -30,7 +30,24 @@ namespace OrmTest
             Db.Insertable(new List<UnitDateOfTime22> { new UnitDateOfTime22() { DateTimeOffset1 = DateTimeOffset.Now }, new UnitDateOfTime22() { DateTimeOffset1 = DateTimeOffset.Now } }).ExecuteCommand();
             var list2 = Db.Queryable<UnitDateOfTime22>().ToList();
 
+            Db.CodeFirst.InitTables<UnitTestPk>();
+            Db.CodeFirst.InitTables<UnitTestPk>();
+            Db.CodeFirst.InitTables<UnitTestPk>();
         }
+
+        public class UnitTestPk 
+        {
+            [SqlSugar.SugarColumn(IsPrimaryKey =true,IsIdentity =true)]
+            public int id { get; set; }
+            [SqlSugar.SugarColumn(IsPrimaryKey = true )]
+            public long id2 { get; set; }
+            [SqlSugar.SugarColumn(IsPrimaryKey = true )]
+            public Guid id3 { get; set; }
+
+            public string Name { get; set; }
+        
+        }
+
         [SqlSugar.SugarTable("UnitDateOfTime221")]
         public class UnitDateOfTime22
         {
diff --git a/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/DbMaintenance/PostgreSQLDbMaintenance.cs b/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/DbMaintenance/PostgreSQLDbMaintenance.cs
index 497017d60..9b1119fe6 100644
--- a/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/DbMaintenance/PostgreSQLDbMaintenance.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/DbMaintenance/PostgreSQLDbMaintenance.cs
@@ -394,6 +394,34 @@ namespace SqlSugar
             if (result == null || result.Count() == 0)
             {
                 result = base.GetColumnInfosByTableName(tableName, isCache);
+            }
+            try
+            {
+                string sql = $@"select  
+                               kcu.column_name as key_column
+                               from information_schema.table_constraints tco
+                               join information_schema.key_column_usage kcu 
+                               on kcu.constraint_name = tco.constraint_name
+                               and kcu.constraint_schema = tco.constraint_schema
+                               and kcu.constraint_name = tco.constraint_name
+                               where tco.constraint_type = 'PRIMARY KEY'
+                               and kcu.table_schema='public' and 
+                               upper(kcu.table_name)=upper('{tableName}')";
+                var pkList = this.Context.Ado.SqlQuery<string>(sql);
+                if (pkList.Count >1) 
+                {
+                    foreach (var item in result)
+                    {
+                        if (pkList.Select(it=>it.ToUpper()).Contains(item.DbColumnName.ToUpper())) 
+                        {
+                            item.IsPrimarykey = true;
+                        }
+                    }
+                }
+            }
+            catch  
+            {
+
             }
             return result;
         }