Human communication covers two forms: verbal and nonverbal. Nonverbal communication is an indispensable and inseparable part of human interaction and communication. As a main part of nonverbal communication, body language includes posture, gesture, eye contact, facial expression and so on. Body language plays an important role in utterance meaning such as supplement, accenting, repetition or substitute. Body language belongs to a part of culture. It is unavoidable to have body language misunderstanding since it has different meanings in different culture background, so it is necessary for us to master body language of different cultures. This thesis focuses on the communicative functions of body language from the perceptive of cultural differences. In this way, people can understand body language better and improve our communicationl.