The three-dimensional digitalization transfer of Qinghai-Tibet ± 400 kV DC interconnection project aims to promote the application of three-dimensional design technology in the converter stations design. The project made effort to realize professional transfer information with universal platforms by adopted universal three-dimensional design software and considering the convenience of owner management. When Lhasa and Golmud stations were transferred to the operation company, the real three-dimensional models and the classified construction drawings of stations were provided, which was beneficial to these two stations owner management and operation maintenance.