Abstract: Postgraduate teachers' participation in undergraduate experimental teaching can solve the problem of insufficient teachers in colleges and universities to a certain extent, relieve the teaching pressure of teachers, which is one of the important ways to improve the quality of undergraduate and postgraduate teaching. This paper expounds the necessity, teaching mode and function of graduate students participating in undergraduate experiment. In view of the problems existing in postgraduate students' participation in undergraduate experimental teaching, such as the lack of practical ability, teaching ability, sense of responsibility and team consciousness, this paper puts forward corresponding solutions to better play the role of postgraduate students in undergraduate experimental teaching, improve the effect of undergraduate experimental teaching, and improve the quality of postgraduate training.

Key words: Postgraduate, Experimental teaching, Teaching mode, Comprehensive ability, Team spirit, Teaching quality