Pumping power generation device and power generation method using abandoned mine

The invention discloses a water pumping power generation device and method utilizing a waste mine. The water pumping power generation device comprises a base, symmetrically-distributed blades are fixedly connected to the top of the base, a rotating shaft is rotationally connected between the two sets of blades, and symmetrically-distributed connecting frames are fixedly connected to the outer wall of the rotating shaft in a sleeving mode. A lifting pump lifts water in a waste well to a connecting pipe through a lifting pipe and a water outlet pipe, then the water is shunted through a conveying pipe, the kinetic energy of water outflow is improved through inclination of the conveying pipe, water impacts blades to enable a rotating shaft to rotate, then the water is poured down through an inclined face of the rear section of a base, and the water is guided to rotating blades in a water collecting cover through a drainage plate; the rotating blades rotate to enable the driven shaft to rotate, the driven shaft ro