Magnetic surface geometry is an innovative tool for assisting geometry teaching, which includes magnetic patches with various geometries. In teaching, by splicing magnetic patches, visually demonstrate the combination and decomposition of graphics, such as two right angled triangles pieced together to form a square; Mobile patch demonstration graphics transformation, such as translation and rotation. Can annotate side length and angle, and derive formulas for perimeter and area. Group building competitions can be held in the classroom to cultivate spatial thinking and collaboration skills. Being able to transform abstract geometric concepts into dynamic operations and enhance students' understanding and creativity is an ideal tool for geometry teaching in primary and secondary schools.