diff --git a/FreeSql.Tests/FreeSql.Tests/Dameng/Curd/DamengSelectTest.cs b/FreeSql.Tests/FreeSql.Tests/Dameng/Curd/DamengSelectTest.cs
index 11f712fb..0625c670 100644
--- a/FreeSql.Tests/FreeSql.Tests/Dameng/Curd/DamengSelectTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests/Dameng/Curd/DamengSelectTest.cs
@@ -868,6 +868,17 @@ WHERE (((a.""NAME"") in (SELECT s.""TITLE"" as1
                 .OrderBy(a => a.Key)
                 .ToList(a => a.Sum(a.Value.TypeGuid));
 
+            var aggsql110 = select
+                .GroupBy(a => a.Title)
+                .ToSql(b => new
+                {
+                    tit = b.Key,
+                    cou = b.Count(),
+                    sum2 = b.Sum(b.Value.TypeGuid)
+                }, FieldAliasOptions.AsProperty);
+            Assert.Equal(@"SELECT a.""TITLE"" ""TIT"", count(1) ""COU"", sum(a.""TYPEGUID"") ""SUM2"" 
+FROM ""TB_TOPIC22"" a 
+GROUP BY a.""TITLE""", aggsql110);
             var aggsql1 = select
                 .GroupBy(a => a.Title)
                 .ToSql(b => new
@@ -876,6 +887,9 @@ WHERE (((a.""NAME"") in (SELECT s.""TITLE"" as1
                     cou = b.Count(),
                     sum2 = b.Sum(b.Value.TypeGuid)
                 });
+            Assert.Equal(@"SELECT a.""TITLE"" as1, count(1) as2, sum(a.""TYPEGUID"") as3 
+FROM ""TB_TOPIC22"" a 
+GROUP BY a.""TITLE""", aggsql1);
             var aggtolist1 = select
                 .GroupBy(a => a.Title)
                 .ToList(b => new
diff --git a/FreeSql/Internal/CommonExpression.cs b/FreeSql/Internal/CommonExpression.cs
index f1232098..c806edd3 100644
--- a/FreeSql/Internal/CommonExpression.cs
+++ b/FreeSql/Internal/CommonExpression.cs
@@ -198,7 +198,17 @@ namespace FreeSql.Internal
                         }
                         if (diymemexp != null && exp is MemberExpression expMem2 && expMem2.Member.Name == "Key" && expMem2.Expression.Type.FullName.StartsWith("FreeSql.ISelectGroupingAggregate`"))
                         {
-                            field.Append(diymemexp._field);
+                            field.Append(diymemexp._field); 
+                            if (diymemexp._map.Childs.Any() == false) //处理 GroupBy(a => a.Title) ToSql(g => new { tit = a.Key }, FieldAliasOptions.AsProperty) 问题
+                            {
+                                if (index >= 0) field.Append(_common.FieldAsAlias($"as{++index}"));
+                                else if (index == ReadAnonymousFieldAsCsName)
+                                {
+                                    var csname = GetFieldAsCsName(parent.CsName);
+                                    if (diymemexp._field.EndsWith(csname, StringComparison.CurrentCultureIgnoreCase) == false) //DbField 和 CsName 相同的时候，不处理
+                                        field.Append(_common.FieldAsAlias(csname));
+                                }
+                            }
                             var parentProp = parent.Property;
                             diymemexp._map.CopyTo(parent);
                             parent.Property = parentProp; //若不加此行，会引用 GroupBy(..).ToList(a => new Dto { key = a.Key }) null 错误，CopyTo 之后 Property 变为 null