The utility model belongs to the technical field of water -storage power station water supply system, a novel water -storage power station water supply system is provided. Including upper reaches water -stop dam, draw water power station and low reaches water -storage power station, drawing water, the power station is located upper reaches water -stop dam and draw water between this storage station in low reaches. The reservoir intake on upper reaches water -stop dam passes through conduit and low reaches water -storage power station intercommunication for supply water for upper storage reservoir A. Draw water power station top upper storage reservoir B, supply water for upper storage reservoir A through conduit, upper storage reservoir B is through pipeline and the suction pump intercommunication of drawing water simultaneously for take out the water in river course under the low reaches to upper storage reservoir B. The upper storage reservoir A of low reaches water -storage power station top passes through conduit and is connected with tail water turbine generating set, is used for the electricity generation. The utility model discloses can be through the water electricity generation of flowing automatically, there is not the phenomenon of the wasting of resources in consumption of electric energy not, and the effect of peak regulation can be played in the regularly electricity generation of can impounding, through drawing water in the small -size power station of drawing water, a lot of electric energy can be saved from local sail the that the discrepancy in elevation is little to the water.