Objective: To discuss the personality traits of medical students,in order to provide references for building medical occupational personality of medical staff.Method: Adopt Cartel's questionnaire of 16 personality traits to survey 462 medical students.Result: Medical students possess several personality traits,including lack of learning,being perfunctory,easy-going,conservative and obedient,but meanwhile they also possess steady psychological diathesis and creativity.Conclusion: There are three aspects to be concerned in building personalities of medical staff,including confirming the shaping direction,emphasizing professional knowledge as well as humanities subjects,and stressing the combination of theory and practice.