The modern badminton matches are performed with fierce competition and great hospitality. As college students＇ proficiencies develop, badminton competition becomes more and more fierce and the students＇ mental power plays a more and more important role in the matches. In many cases, mental power is the deciding factor to success. Through the analysis of the psychology of sixty undergraduate students who are in the class specialized in badminton, this paper aims to find out the methods of adjusting students＇ mental state in the matches to help them perform well in the training and matches. Documents will be fully used.