Micro course innovates teaching methods, promotes the development in professional field, provides autonomous learning environment for students, guides students to form correct learning methods, promotes the teaching informationization development, and updates the structure of education resources. In order to solve the problems of computer learning difficulty for the students and insufficient knowledge reserve for the teachers, we apply micro course in computer teaching, decompose the teaching task in the whole teaching design, make teaching modules, rebuild the teaching structure, and determine the teaching content and target.