Idioms are an important reflection of the culture of a language. English and Chinese are both rich in idioms. However, owing to different cultural factors, the cultural messages embodied in their respective idioms naturally display substantial differences as well as similarities. If we neglect such factors, we will make mistakes in idiom-interpretation. This paper mainly talks about the cultural differences embodied in English and Chinese idioms to remind English majors of the strong cultural characteristics of idioms for better understanding and smooth communication. However, due to different cultural factors, the cultural messages embodied in their 各 ididoms naturally display substantial differences as well as similar similar. If we neglect such factors, we will make mistakes in idiom-interpretation. This paper mainly talks about the cultural differences embodied in English and Chinese idioms to remind English majors of the strong cultural characteristics of idioms for better understanding and smooth communication.