With the rapid development of the economy and the increasing improvement of people’s living standards, the social demand for electricity is increasing, and the construction of a strong and reliable power grid seems to be crucial. Grid investment construction is directly related to the development of the economy, the improvement of people’s living standards and the safe and economic operation of the grid. In this paper, according to the construction principle of index system, the index system for analyzing the investment efficiency of power grid enterprises is established, the research theory of system dynamics is introduced, and the simulation model of power grid investment efficiency is constructed. The parameters of the model are set, and the economic benefits generated by the investment in power grid of Province A are simulated from the economic benefits of the power grid, social benefits and environmental benefits, and the investment benefits are analyzed by using the super-efficient DEA model. After the simulation analysis of the investment benefits of power grid in province A, it can be proved that the simulation model of power grid investment benefits based on system dynamics established in this paper is scientific and effective. H grid company is selected as the object of empirical research, H grid company investment comprehensive efficiency is low, mainly because the technical efficiency constraints on the improvement of comprehensive efficiency.
