In China, English classroom is the main place of English language acquisition. Therefore, how to improve English classroom teaching effectively has become the scholars' concern. This paper reports a study conducted at North China Electric Power University on the functions of western cultural nonverbal behaviors in English classroom in China. Questionnaires with both close-ended and open-ended questions were distributed to the students. By means of quantitative and qualitative research methods, this paper analyzed the functions of western cultural nonverbal behaviors in English classroom and found that: 1) as a foreign language teacher you need not only to speak foreign language but also transmit cultural knowledge to students; 2) the nonverbal behaviors which reflect the western culture can have the positive effects on second language learning; 3) Non-verbal behavior should be involved in the teaching and learning processes.