Traditional architectural design needs to consider many factors, especially the limitations of construction technology. Many architectural design concepts are difficult to achieve due to technical limitations. Traditional architectural design is mainly based on drawing design, but 3D printing technology can be used for three-dimensional model design, combining traditional drawings with geographic information, architectural scanning and other electronic data, and presenting them in physical form. It can show real three-dimensional scenes through real-life modeling. The preliminary design model can be made into a proportional three-dimensional model through steps such as segmentation, monomerization and scaling, and then the model can be printed out 1:1 using 3D printing technology. 3D printing can handle the model flexibly, and adjustments can be made by editing and modifying the file directly. At the same time, it can also facilitate multi-color printing, and even add different elements such as transparency and metal to the model.