Abstract: Objective To understand the level of mental quality among college students and its relationship with subjective well-being,and to provide an aid for cultivation of mental quality.Methods Mental Quality Inventory of College Students,Happiness Scale of International Questionnaire were examined in 938 college students.Results Mental quality scores of males were higher than that of females(P<0.05).Professional ability scores of students in grade three were higher than that of students in grade two(P<0.05).Learning mental quality scores of students in grade four were higher than that of students in grade two(P<0.05);Self-awareness scores of students in grade four were higher than those of students in grade one and grade two(P<0.05).Mental quality scores of students came from city were higher than that of students who came from town(n<0.01).Self-awareness and interpersonal management were excellent predictors of subjective well-being.Conclusion More attention should be paid to the cultivation of mental quality of college students.