Routing and switching technology is one of the hot subjects of computer science, which is the important foundation of learning computer technology. With the increasing number of students in recent years, the difficulty in teaching is also rising. It is a difficult problem that how to build a new teaching system to improve the teaching efficiency. With the research on the contents of routing and switching technology, this paper discusses on the deficiency of traditional teaching, and puts forward several suggestions for innovative construction, so as to contribute to the exploration of teaching innovation.