Constructivism originated from pedagogy. As a learning theory, it is put forward to improve teaching. Its main purpose is to understand how various activities in the development process trigger children's autonomous learning, and how teachers can properly play the role of supporters in the learning process. Introduction to Constructivism Nowadays, there is a revolution in the field of educational psychology, which is marked by the rise and widespread concern of constructivist learning theory. Constructivism teaching theory is characterized by opposing the mechanical objectivism of knowledge in traditional teaching, while mathematics needs flexible and divergent thinking to learn, allowing students to actively construct in the learning process, and combining mathematics teaching with situational interaction to make students more interested and motivated to learn mathematics.