Abstract: The Sympton1s Check List g0 (SCL-90) was used to examine the mental health condition of 500 senior middle school students The results indicated that 10.8%of the students showed all kinds of obvious mental health problems and that these mental health problems were essentially focused on obsessive-compulsive, hostilty, paranoid ideation, interpersonal sensitivity and depression.It was uncovered in a multiple factors analysis that the major factors which influenced the mental health of the students were school education, social culture, family environment and the student himself.

Key words: mental health, life event, factor analysis, SCL-90, senior middle school student