Objective　To explore the postgraduate tutor assessment system in order to provide suggestions to improve the quality of postgraduate education. Methods　Assessment indexes of post-graduate tutor were screened and assigned by methods of questionnaire investigation， interview， kruskal wallis H-test， taking a total of 109 students and professors in medical colleges in the south-western part as research objects. Results　Different populations had different cognitions on the important degree of each index， P<0.05. Primary indexes of assessment system were determined based on the importance of indicators and the influence of different cognitive levels， including tutor personal accom-plishment， teaching ability， scientific research quality and guiding ability（P<0.05）. Conclusions　Assessment system and method fined by this study covers majority aspects of tutors and can provide feasible suggestions for tutor evaluation.