Abstract: Proteus simulation technology is introduced into classroom teaching and practice to enrich teaching content through case simulation demonstration, deepen students' understanding of theoretical knowledge and improve the teaching quality of the course in a more intuitive and visual way of teaching. The "theory, simulation, practice" three-level progressive teaching model runs through the whole teaching process, focusing on the combination of knowledge and practice application ability, so that students can get engineering training in the process of solving problems, so that students can get all-round training in all aspects of teaching, and improve their interest in learning and innovation ability.