To prepare students with necessary knowledge and skills is a necessary condition for students to participate actively in mathematics classroom teaching. Therefore, in the process of mathematics teaching, teachers should reduce the difficulty of new knowledge, make new knowledge something familiar to students. Motivate students to solve problems, or find the connection between old and new knowledge. It is rare for students to be completely unfamiliar with the contents of mathematics. They are always familiar with and unfamiliar with the contents of mathematics. Students should find out the common points and differences between the old knowledge and the new knowledge, complete the positive transfer smoothly, and solve the new problems through similar exploration.