The behaviors remolding of foreign language teachers (FLT) are effective and influential in eliciting the learners' interest and motivation as well as enhancing the learning proficiency. Nonverbal communication (NVC) is an essential component of human verbal communication. Sometimes it is even more powerful and expressive than verbal interactions, for they can convey such subtle feelings and fine emotions that verbal entries feel impotent of. This paper intends to make a survey on the notion of nonverbal communication and further explore the function and the significance of body language on remolding teachers' behaviors in foreign language teaching.