Abstract: Aiming at the teaching characteristics of the traditional "Single Chip Microcomputer Principles and Applications" course, the teaching reform ideas of the MCU course are elaborated. On the basis of retaining the integrity of the original course knowledge system, the theoretical and experimental teaching contents are reconstructed, and a modular teaching method is proposed Method, the teaching content is divided into five major modules, each module is divided into basic projects and extended projects, highlighting the applicability and innovation, and cleverly integrating theoretical knowledge into the module projects, solving the basic and the outstanding contradiction of application requirements. The results of teaching practice show that the reform of modular teaching method has achieved remarkable results.

Key words: "Principle and application of single chip microcomputer", Modular teaching method, Teaching reform