3D geometric solid models are teaching tools that visually present spatial geometric structures, including common models such as cubes, spheres, cones, and frustums. Some models can be disassembled to clearly display the internal structure and constituent elements. In teaching, by observing the model, one can directly perceive the number and shape of vertices, edges, and faces of geometric objects, such as the 6 congruent square faces and 12 equally long edges of a cube. Suitable for geometry teaching in primary and secondary schools, it transforms abstract spatial concepts into tangible models, helps students establish spatial cognition, understand the projection and cross-sectional characteristics of geometric objects, and cultivate spatial imagination.