According to the data of Baidu Library, excellent classes in Fuqiang Campus of Hong Fei School adopt the form of "small class teaching", which meets the needs of quality education, provides students with an equal education platform, forms a harmonious teacher-student relationship through teacher-student interaction, makes the learning process more transparent and creates a good learning atmosphere for students. It highlights the characteristics that small class teaching allows students to fully enjoy education. Of course, mathematics is still one of the eternal and most important parts of school education. Mathematics is offered in all primary and secondary schools in China, and it is regarded as one of the most important courses that people need to learn in their life.