diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
index f170c51e1..ea8c06048 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
@@ -264,6 +264,12 @@ namespace SqlSugar
             return string.Format("COUNT({0})", parameter.MemberName);
         }
 
+        public virtual string AggregateDistinctCount(MethodCallExpressionModel model)
+        {
+            var parameter = model.Args[0];
+            return string.Format("COUNT(DISTINCT{0})", parameter.MemberName);
+        }
+
         public virtual string MappingColumn(MethodCallExpressionModel model)
         {
             var parameter = model.Args[0];
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs
index 8ede5cbab..5f4845c6f 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs
@@ -48,6 +48,7 @@ namespace SqlSugar
         string AggregateMin(MethodCallExpressionModel model);
         string AggregateMax(MethodCallExpressionModel model);
         string AggregateCount(MethodCallExpressionModel model);
+        string AggregateDistinctCount(MethodCallExpressionModel model);
         string MappingColumn(MethodCallExpressionModel model);
         string IsNull(MethodCallExpressionModel model);
         string GetSelfAndAutoFill(string shortName,bool isSingle);
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs
index 360df84d6..8a851f7af 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs
@@ -578,6 +578,8 @@ namespace SqlSugar
                         return this.Context.DbMehtods.AggregateMax(model);
                     case "AggregateCount":
                         return this.Context.DbMehtods.AggregateCount(model);
+                    case "AggregateDistinctCount":
+                        return this.Context.DbMehtods.AggregateDistinctCount(model);
                     case "MappingColumn":
                         var mappingColumnResult = this.Context.DbMehtods.MappingColumn(model);
                         var isValid = model.Args[0].IsMember && model.Args[1].IsMember == false;