diff --git a/Src/Asp.NetCore2/MongoDbTest/UnitTest/QueryWhere.cs b/Src/Asp.NetCore2/MongoDbTest/UnitTest/QueryWhere.cs
index 0d5cf5b55..1a28829f0 100644
--- a/Src/Asp.NetCore2/MongoDbTest/UnitTest/QueryWhere.cs
+++ b/Src/Asp.NetCore2/MongoDbTest/UnitTest/QueryWhere.cs
@@ -105,7 +105,12 @@ namespace MongoDbTest
             var dt = DateTime.Now.AddDays(-10);
             db.Insertable(new Student() { Name = "jack",CreateDateTime= dt, Bool = true, SchoolId = 2 }).ExecuteCommand();
             db.Insertable(new Student() { Name = "tom_null", CreateDateTime = DateTime.Now.AddDays(-110), Bool = false, BoolNull = true, SchoolId = 3, SchoolIdNull = 4 }).ExecuteCommand();
-            var x=db.Queryable<Student>().ToList();
+            var x1=db.Queryable<Student>().ToList();
+            var x2 = db.Queryable<Student>().Where(it=>it.Bool==true).ToList();
+            var x3=db.Queryable<Student>().Where(it => it.Bool).ToList();
+            if (x3.Count != x2.Count) Cases.ThrowUnitError();
+            if (x3.First().Id != x2.First().Id) Cases.ThrowUnitError();
+            if (x3.First().Bool!=true) Cases.ThrowUnitError();
         }
 
         [SqlSugar.SugarTable("UnitStudent1ssss23s131")]
diff --git a/Src/Asp.NetCore2/SqlSugar.MongoDbCore/MongoDb/SqlBuilder/MongoDbQueryBuilder.cs b/Src/Asp.NetCore2/SqlSugar.MongoDbCore/MongoDb/SqlBuilder/MongoDbQueryBuilder.cs
index edd06d1e6..6f9e9baca 100644
--- a/Src/Asp.NetCore2/SqlSugar.MongoDbCore/MongoDb/SqlBuilder/MongoDbQueryBuilder.cs
+++ b/Src/Asp.NetCore2/SqlSugar.MongoDbCore/MongoDb/SqlBuilder/MongoDbQueryBuilder.cs
@@ -180,8 +180,10 @@ namespace SqlSugar.MongoDb
                 if (MongoDbExpTools.IsFieldNameJson(trimmed))
                 {
                     var outerDoc = BsonDocument.Parse(trimmed);
-                    trimmed = outerDoc[UtilConstants.FieldName].AsString;
-                    operations.Add(trimmed);
+                    var fieldName = outerDoc[UtilConstants.FieldName].AsString;
+                    // 这里假定该字段为bool类型，生成 { fieldName: true }
+                    var boolDoc = new BsonDocument(fieldName, true);
+                    operations.Add($"{{ \"$match\": {boolDoc.ToJson(UtilMethods.GetJsonWriterSettings())} }}");
                 }
                 else
                 {