Constructivist learning theory holds that the learning process is a process in which the cognitive structure changes and reorganizes, and the cognitive structure existing in people's minds is constantly changing and constructing. Cognitive construction is a self-construction process that is gradually accumulated under the joint action of external stimuli and learners' individual characteristics. In the classroom, students are the masters of learning and will always be in the main position. In learning activities, teachers are guides and helpers and should play a leading role. Teachers can divide students into different groups for collaborative learning according to their cognitive level, ability, personality characteristics, gender and age. Collaborative learning carries out learning activities in the form of group discussion and consultation, aiming at perfecting and deepening the understanding and mastery of knowledge through learning the wisdom of the group. In the process of collaborative learning, group students should discuss and communicate to reach a unified understanding. At this time, teachers should pay attention to inspiration and induction, and lead the theme of the activity to depth, thus prompting the essence and law of the problem.