At present

the domestic reform of the electric power system is comprehensively deepening

and the power retail business will be liberalized on a large scale

which will have a huge impact on the production and operation of power grid enterprises while bringing dividends to the society. The system dynamics model is introduced to conduct quantitative research. According to the business process

seven submodels of power retail business costrevenue model

power transmission and distribution business revenuscost model

power valueadded service revenuscost model

grid staff turnover model

cash flow model

demandside response model

power retail and related business profit model are respectively established. Based on the relevant data of the 2018 annual report of the electric power market in a province

the influence of the relevant indicators of the electric power grid is analyzed through three scenarios

namely the change of the growth rate of marketized electric power

the change of the agent electric power of the electric power selling company and the change of the price difference between the purchase and sale of electric power. The study has certain reference value for power grid enterprises to actively respond to the reform and carry out the evaluation of power system reform.