BOPPPS teaching mode is a goal-oriented and student-centered teaching mode. It emphasizes students' participatory learning and attaches great importance to classroom interaction and inquiry. In order to change the disadvantages of traditional teaching, this paper discusses the perfect fit between this model and the "number and algebra" classroom in junior high school mathematics. On this basis, a series of teaching strategies are provided for reference. The teaching process of "number and algebra" under the BOPPPS teaching mode is constructed. This provides experience for junior high school mathematics teaching.