Abstract: The power electronics technology course has the characteristics of strong engineering and difficulty in understanding the principle.In the inquiry experiments,the determination of the experimental parameters is often difficult,and the explanation and understanding of the special experimental phenomena are more complex.In this paper,the Psim simulation is used to reproduce the experimental phenomena,to determine the experimental parameters,to explore the experiment and to solve the difficult problems in theory.The practice shows that the introduction of Psim simulation in the inquiry experiment of power electronics effectively may stimulate the students' interest in learning the course,and improve the students' ability to apply the knowledge in the can effectively stimulate the students’ interest in learning,and can improve the students’ ability to apply the knowledge to the engineering practice and actual teaching effect.