In this paper, using the methods of literature, questionnaire, expert interview and mathematical statistics method carry on the analysis to the theory of social psychology and students＇ expressive force in college aerobics teaching. Research shows that the factors affecting students＇expressive force of aerobics teaching mainly include temperament and character, psychological quality, consciousness of dance, music accomplishment and interest. We should pay attention to the individual differences of students, inner changes and needs of students and train students＇ personality in teaching .Hope that this research can provide theoretical support for the aerobics teaching in College