区别如下：
1、中文释义
traditional 传统的(历史悠久,流传下来的一种习惯或习俗,有时候也表示"一般的,常规的"这层意思)；惯例的。
conventional 表示传统的(含"守旧的"这意思,表示不愿意革新的)；常规的，约定的，习惯的，常用的。
2、英文释义
traditional：Traditional customs, beliefs, or methods are ones that have existed for a long time without changing. 传统的
conventional：Someone who is conventional has behaviour or opinions that are ordinary and normal. (行为观念等) 传统的
3、其他方面
conventional的词义要比traditional丰富，traditional词义贴近从文化上来论述，conventional
是此种从习俗上，在交叉的领域二者意思可以互换。
扩展资料：
traditional
1、It's traditional in America to eat turkey on Thanksgiving Day.
感恩节时吃火鸡是美国的传统。
2、Their marriage is very traditional.
他们的婚姻十分守旧。
3、Housework has traditionally been regarded as women's work.
家务劳动历来被认为是妇女的事。
conventional
1、She's very conventional in her views.
她的观点很守旧。
2、It's not a hotel, in the conventional sense, but rather a whole village turned into a hotel.
从传统意义上来说，这并不是一个旅馆，而是变成了旅馆的整个村庄。
参考资料：