Teaching practice is an important link in the process of postgraduate training. This paper analyzes the current situation and existing problems of postgraduate teaching practice, and discusses the influence of new teaching practice mode on postgraduate training. Aiming at the problems existing in the teaching practice of postgraduate students, this paper carries out the reform from five aspects: subject course learning, teaching preparation, theoretical teaching, experimental teaching participation and teaching management participation, and evaluates the implementation effect of the reform. Through the reform of postgraduate teaching practice, the teaching ability and social competitiveness of postgraduate students have been effectively improved. The new teaching practice mode provides new ideas and methods for the cultivation of postgraduate students' teaching ability.