With the improvement of information technology level, power generation groups and other group power enterprises pay more and more attention to the unified formulation of digital development plans, and are committed to realizing the integration, sharing and collaboration of digitization within the whole group. The overall pattern of. Focusing on refining the management of power grid digital investment before, during and after the event, this paper proposes a strategy to improve the accuracy of power grid digital investment based on fuzzy decision tree, and carries out research through accurate data analysis to effectively improve the efficiency of power grid digital investment and the sustainable development ability of enterprises, so as to maintain and increase the value of state-owned assets