diff --git a/Src/Asp.Net/SqlSugar/Enum/ProperyType.cs b/Src/Asp.Net/SqlSugar/Enum/ProperyType.cs
index 9ec673439..2ce145aec 100644
--- a/Src/Asp.Net/SqlSugar/Enum/ProperyType.cs
+++ b/Src/Asp.Net/SqlSugar/Enum/ProperyType.cs
@@ -15,6 +15,7 @@ namespace SqlSugar
         @double,
         @Guid,
         @byte,
+        @sbyte,
         @enum,
         @short,
         @long,
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Common/SugarParameter.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Common/SugarParameter.cs
index c04b267b3..f0518e03d 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Common/SugarParameter.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Common/SugarParameter.cs
@@ -110,6 +110,10 @@ namespace SqlSugar
             {
                 this.DbType = System.Data.DbType.Byte;
             }
+            else if (type == UtilConstants.SByteType)
+            {
+                this.DbType = System.Data.DbType.SByte;
+            }
             else if (type == UtilConstants.FloatType)
             {
                 this.DbType = System.Data.DbType.Single;
diff --git a/Src/Asp.Net/SqlSugar/Utilities/UtilConstants.cs b/Src/Asp.Net/SqlSugar/Utilities/UtilConstants.cs
index 6387f7f01..5aee5dc5f 100644
--- a/Src/Asp.Net/SqlSugar/Utilities/UtilConstants.cs
+++ b/Src/Asp.Net/SqlSugar/Utilities/UtilConstants.cs
@@ -24,6 +24,7 @@ namespace SqlSugar
         internal static Type BoolType = typeof(bool);
         internal static Type BoolTypeNull = typeof(bool?);
         internal static Type ByteType = typeof(Byte);
+        internal static Type SByteType = typeof(sbyte);
         internal static Type ObjType = typeof(object);
         internal static Type DobType = typeof(double);
         internal static Type FloatType = typeof(float);