Based on an in-depth analysis of the digital design needs of power grid enterprises and power design enterprises, a digital design technological system was established for promoting the development of digital design technology in China. Rules were formulated for guiding the direction of information construction of power design enterprises so as to realize sharing of design information in the whole life cycle of the power projects and to ensure the certainty, integrity and uniqueness of information. The digital design technology system can be used as platform to improve the labor productivity of design enterprises, ensure the design quality of the finished products, and promote the coordinated development of power transmission & transformation design, power grid construction and management for achieving a win-win situation.