Abstract: The research of the home court spectators' deviance of Shanxi Zhongyu basketball team in the CBA league indicates a rising tendency in terms of the frequency and development situation in such behaviors. The research shows that the incident is characterized by its being non-rational, hidden, concentrated and devastating. There are six influencing factors involving society, history, psychology, security, players and referees. The countermeasures to stop such deviances are closely related to fan culture.

Key words: CBA league, home spectators, deviant behaviors