The invention discloses a power grid stock right transfer estimation method based on cash flow declaration. The method belongs to the field of power grid stock right transfer. The method comprises thefollowing steps: S1: initializing a model inputting the capital and debt tables in the previous two years; calculating historical data such as a loss table and a cash flow table and key parameters such as operation activities, operation funds, capital investment, debts and interest, and S2, calculating a model, and calculating a future 13-year asset debt table, a loss table and a cash flow tablein two stages according to set parameters and base period data, and summarizing and predicting long-term and short-term borrowing and cash balance. According to the power grid stock right transfer estimation method, a power grid cash flow sequence is measured and calculated by means of a simulation model; The method is used as a basic science to reasonably determine transfer assessments in the forms of reform and recombination of mixed ownership systems of non-national capital participation national enterprises, reform and income of reform listing or reform and income of reform listing companies of national control stock listing or national control stock listing companies, stock equity purchase, transfer of debts by subscription, stock equity replacement and the like.