With the rapid development of Internet technology, as a product of manufacturing technology and simulation technology, virtual assembly technology provides a good condition for the product assembly display. Although 3D printing has become more and more popular as a new printing technology, the assembly display of 3D printer is very scarce. In this study, the way to achieve the production of virtual assembly display platform for 3D printers is introduced to meet the needs of new product development, maintenance and operation training. Makerbot Replicator2 3D printer is used and the structure of 3D printer is modeled through the 3D modeling software Solidworks. Afterward, the processes of mapping and animation are conducted in 3ds Max. Finally, the fabrication of the interactive display platform is completed in the import VRP. What is obtained is the virtual assembly platform which can realize the function of model display and assembly demonstration of 3D printer. The application of virtual reality technology to 3D printer can present the overall structure and function of 3D printer in a digital interactive mode so that it will no longer be restricted by environment and location conditions. Besides, it also provides a new way for the design, improvement, maintenance and management of industrial products, which is convenient to users to understand the internal and external structure and related functions of the 3D printer as quickly as possible.