Abstract： Nowadays the medical students＇ professional behavior assess syslem (SPBAS),based on Global Minimum Essential Requirements in Medical Education,has aroused extensive concern.In this thesis,the authors carried on a comparative study on different attitudes among the medical students in different educational periods of long-term program.Due to the research,the authors suggest that educators should pay more attention to the training of medical students＇ professional behavior,and work out medical programs according to genders during different periods of education procress.