The digital transformation of contract management of power plant project construction and installation engineering is based on the requirements of strengthening lean contract management, in accordance with the ideas of improving understanding, consolidating the foundation, first pilot and then promotion, with the goal of optimizing contract management system documents, strengthening contract performance process control, deepening the digital transformation of contract management, with collaboration and data as the core. Carry out digital transformation from the four aspects of management capability, business process, contract fee control and contract cost, build a digital contract management system suitable for the characteristics of the power plant industry, achieve high-quality contract development, and improve the power plant general contract management ability of nuclear energy companies.