diff --git a/Src/Asp.Net/PgSqlTest/UnitTest/Updateable.cs b/Src/Asp.Net/PgSqlTest/UnitTest/Updateable.cs
index 444b8e0e3..8ec8cc2a1 100644
--- a/Src/Asp.Net/PgSqlTest/UnitTest/Updateable.cs
+++ b/Src/Asp.Net/PgSqlTest/UnitTest/Updateable.cs
@@ -70,9 +70,28 @@ namespace OrmTest
               .Where(it => it.a)
       .ExecuteCommand();
 
+            // Db.CodeFirst.InitTables<UnitPk00121>();
+            //Db.CodeFirst.InitTables<UnitPk001212>();
+            //Db.Deleteable<UnitPk00121>().Where(new UnitPk00121() { Id=1, CreateTime=DateTime.Now, Name="a" }).ExecuteCommand();
+            //Db.Deleteable<UnitPk001212>().Where(new List<UnitPk001212> { new UnitPk001212() { Id = 1, CreateTime = DateTime.Now, Name = "a" } , new UnitPk001212() { Id = 2, CreateTime = DateTime.Now, Name = "11a" } }).ExecuteCommand();
         }
     }
-
+    public class UnitPk00121 
+    {
+        [SugarColumn(IsPrimaryKey = true)]
+        public int Id { get; set; }
+        [SugarColumn(IsPrimaryKey = true)]
+        public DateTime? CreateTime { get; set; }
+        public string Name { get; set; }
+    }
+    public class UnitPk001212
+    {
+        [SugarColumn(IsPrimaryKey = true)]
+        public int Id { get; set; }
+        public DateTime? CreateTime { get; set; }
+        [SugarColumn(IsPrimaryKey = true)]
+        public string Name { get; set; }
+    }
     public class BoolTest1
     {
         public bool a { get; set; } 
diff --git a/Src/Asp.Net/SqlSugar/Abstract/DeleteProvider/DeleteableProvider.cs b/Src/Asp.Net/SqlSugar/Abstract/DeleteProvider/DeleteableProvider.cs
index 311aac329..766d2cb9e 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/DeleteProvider/DeleteableProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/DeleteProvider/DeleteableProvider.cs
@@ -144,6 +144,10 @@ namespace SqlSugar
                         {
                             andString.AppendFormat(DeleteBuilder.WhereInEqualTemplate, primaryField.ToUpper(), entityValue);
                         }
+                        else if (this.Context.CurrentConnectionConfig.DbType == DbType.PostgreSQL&& (this.Context.CurrentConnectionConfig.MoreSettings==null||this.Context.CurrentConnectionConfig.MoreSettings?.PgSqlIsAutoToLower==true))
+                        {
+                            andString.AppendFormat("\"{0}\"={1} ", primaryField.ToLower(), new PostgreSQLExpressionContext().GetValue(entityValue));
+                        }
                         else
                         {
                             andString.AppendFormat(DeleteBuilder.WhereInEqualTemplate, primaryField, entityValue);
diff --git a/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLExpressionContext.cs b/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLExpressionContext.cs
index 1a31dd6f5..97bd3f200 100644
--- a/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLExpressionContext.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLExpressionContext.cs
@@ -101,6 +101,35 @@ namespace SqlSugar
                 return propertyName.ToLower(isAutoToLower);
             }
         }
+
+        public  string GetValue(object entityValue)
+        {
+            if (entityValue == null)
+                return null;
+            var type = UtilMethods.GetUnderType(entityValue.GetType());
+            if (UtilConstants.NumericalTypes.Contains(type))
+            {
+                return entityValue.ToString();
+            }
+            else if (type == UtilConstants.DateType)
+            {
+                return this.DbMehtods.ToDate(new MethodCallExpressionModel()
+                {
+                    Args = new System.Collections.Generic.List<MethodCallExpressionArgs>() {
+                 new MethodCallExpressionArgs(){ MemberName=$"'{entityValue}'" }
+                }
+                });
+            }
+            else 
+            {
+                return this.DbMehtods.ToString(new MethodCallExpressionModel()
+                {
+                    Args = new System.Collections.Generic.List<MethodCallExpressionArgs>() {
+                 new MethodCallExpressionArgs(){ MemberName=$"'{entityValue}'" }
+                }
+                });
+            }
+        }
     }
     public class PostgreSQLMethod : DefaultDbMethod, IDbMethods
     {