Supervisor is the first responsible person for postgraduate education, who shoulders the noble mission to cultivate high-level innovative talents for the country. However, with the expansion of graduate enrollment scale, the traditional single-supervisor model has been difficult to adapt to the urgent requirements of cultivating high-level innovative talents, then the supervisor-team model comes into being. In this paper, the limitations of single-supervisor model in ideological and political education, innovation ability and international vision training are firstly analyzed. Then, taking postgraduate training in the field of deep rock mechanics and underground engineering in China University of Mining and Technology as an example, ideas on how to build and manage postgraduate supervisor-team are put forward. Finally, from the aspects of national feelings, innovation mind, practical ability, international perspective, and harmonious atmosphere of graduate students, the measures of the supervisor team to improve the quality of talent training are analyzed, which can provide reference for similar colleges and universities to cultivate the innovation capability of postgraduates.