Mathematics practical activity class is a new curriculum form, which aims to solve a practical mathematics problem and stimulate students' mathematical thinking under the guidance of teachers. It is the extension and development of mathematics teaching and the sublimation process of students' understanding and application of basic mathematics knowledge and skills. In this process, we always carry out the concept of respecting students' interests, hobbies and needs, give full play to students' subjectivity, pay attention to cultivating students' exploration spirit, cooperation consciousness and practical ability, and let students freely stretch their bodies and minds in practical activities. It takes students' life and practical problems as the carrier and background, focuses on promoting students' independent and harmonious development, takes students' direct experience and latest information as the main content, takes students' independent exploration and special research as the basic form, and takes cultivating students' independent thinking and problem-solving ability as the main task.