Abstract: Based on the analyses of the relationship between the power generation and the stored energy of multi-year regulating storage reservoirs,a fuzzy multi-objective decision-making model for year-end drawdown level of multi-year regulating storage reservoirs in cascade reservoirs is developed.With this model,the optimal year-end drawdown level of multi-year regulating storage reservoir and corresponding optimal power generation of every cascade hydropower station for certain weighted factors can be calculated.