As a model of mental health education, peer counseling of college students receives more and more attention in China. According to the actual situation, some colleges vigorously promote and actively support peer counseling of college students. Peer counseling of college students has become an important supplement to the mental health education. However, due to the lack of innovation of peer counseling, peer counseling of college students in domestic development is relatively slowly. Psychodrama as an important way of group counseling, can make participants get psychological help unwittingly and promote their growth. Application of psychodrama to peer counseling of college students is the innovation of peer counseling, and is the development of mental health education.