Long cube frame model is an intuitive tool to assist in teaching solid geometry. It is composed of metal or plastic rods that can be spliced together, and can be used to build solid frames of rectangular and cubic shapes. The edges are marked with length and include removable surfaces. In teaching, the relationship between length, width, and height can be demonstrated by dissecting and observing the composition of 12 edges, 8 vertices, and 6 faces. Compare rectangular and cubic frameworks to understand their similarities and differences. It can help students establish spatial concepts, intuitively grasp the derivation of formulas such as the total length of edges and surface area, suitable for introductory geometry teaching in primary and secondary schools.