Magnetic tangram is a teaching tool that combines geometric cognition and creative puzzles, consisting of 7 colored magnetic blocks. In class, students can spell out basic shapes such as squares and rectangles, and understand the combination relationships between shapes; Advanced collage of characters, animals, and other patterns, perceiving the characteristics of congruent and similar shapes during operation. Suitable for graphic cognition teaching in lower grades of primary school, magnetic design is easy to display and fix, and can demonstrate the translation, rotation, and flipping of graphics, cultivating spatial concepts and geometric intuition. It is an interesting tool for interdisciplinary teaching of mathematics and art.