Objective  To evaluate the effectiveness of the course of mental health for university students,so as to improve their psychological health of affect and sex,which is the most important part of mental health.Method  Such interactive and directive educational methodology as lecture,behavior guidance, role play,discussion,self  finding and perfection was applied to the course.Result  The percentage of university students who made positive evaluation on the content,formand time arrangement of the course was respectively 90.5%,65.0%,83.4%,and 92.8% students considered the course satisfactory on the whole.80.9% students had medium (or more) change in the cognition of psychological health of affect and sex.And 66.7% students had improved in self  control and problem resolving abilities in love and emotional problems.And those who held positive attitude to self and social sex ethic construction counted up to 52.3%.Conclusion  Course Education is an effective way  for mental health education,which help to improve psychological health of affect and sex of university students.Such educational methods as guidance,interactivity and the application of real cases are proved to be suitable.