diff --git a/Src/Asp.NetCore2/MongoDbTest/UnitTest/QueryWhere.cs b/Src/Asp.NetCore2/MongoDbTest/UnitTest/QueryWhere.cs
index 2d9be2c4f..6ff93f4b0 100644
--- a/Src/Asp.NetCore2/MongoDbTest/UnitTest/QueryWhere.cs
+++ b/Src/Asp.NetCore2/MongoDbTest/UnitTest/QueryWhere.cs
@@ -26,6 +26,16 @@ namespace MongoDbTest
 
             //根据bool过滤
             FilterStudentsByBool(db);
+
+            //更多
+            InsertAndValidateStudent(db);
+        }
+
+        private static void InsertAndValidateStudent(SqlSugarClient db)
+        {
+            db.Insertable(new Student() { Name = "", Bool = true, CreateDateTime = DateTime.Now }).ExecuteCommand();
+            var list = db.Queryable<Student>().Where(it => string.IsNullOrEmpty(it.Name)).ToList();
+            if (!string.IsNullOrEmpty(list.First().Name)) Cases.ThrowUnitError();
         }
 
         private static void FilterStudentsByBool(SqlSugar.SqlSugarClient db)
diff --git a/Src/Asp.NetCore2/SqlSugar.MongoDbCore/MongoDb/SqlBuilder/MongoDbExpressionContext.cs b/Src/Asp.NetCore2/SqlSugar.MongoDbCore/MongoDb/SqlBuilder/MongoDbExpressionContext.cs
index cd21086c4..83670f215 100644
--- a/Src/Asp.NetCore2/SqlSugar.MongoDbCore/MongoDb/SqlBuilder/MongoDbExpressionContext.cs
+++ b/Src/Asp.NetCore2/SqlSugar.MongoDbCore/MongoDb/SqlBuilder/MongoDbExpressionContext.cs
@@ -570,16 +570,21 @@ namespace SqlSugar.MongoDb
 
      public override string IsNullOrEmpty(MethodCallExpressionModel model)
         {
-            // 判断字符串是否为 null 或空字符串
+            // 获取字段名表达式
             var item = model.Args[0].MemberValue ?? model.DataObject;
-            BsonValue memberName = new ExpressionVisitor(context).Visit(item as Expression);
-            // $or: [ { $eq: [ "$field", null ] }, { $eq: [ "$field", "" ] } ]
-            var orDoc = new BsonDocument("$or", new BsonArray
-            {
-                new BsonDocument("$eq", new BsonArray { $"${memberName}", BsonNull.Value }),
-                new BsonDocument("$eq", new BsonArray { $"${memberName}", "" })
-            });
-            return orDoc.ToJson(UtilMethods.GetJsonWriterSettings());
+            var fieldExpr = new ExpressionVisitor(context).Visit(item as Expression);
+
+            string fieldName = fieldExpr.ToString();
+
+            // 生成：{ "$match": { "$or": [ { "Name": null }, { "Name": "" } ] } }
+            var or=new BsonDocument(
+                "$or", new BsonArray
+                {
+            new BsonDocument(fieldName, BsonNull.Value),
+            new BsonDocument(fieldName, "")
+                });
+
+            return or.ToJson(UtilMethods.GetJsonWriterSettings());
         }
          
         public override string Trim(MethodCallExpressionModel model)