The training quality of postgraduate students has always been a focus in the education industry. Proper ratio of tutor and students is the precondition for it. The existing tutor mode cannot afford the enrollment expansion. Tutor team is desired, which can eliminate the conflict between enrollment expansion of postgraduates and lack of tutors. A well configured tutor team can also improve the quality of both the students and the tutors. Scientific research resources and knowledge are well shared under tutor team mode. The constructing mode is proposed, including the team composing mode, tutoring pattern, team management rules and the quality monitoring system.