Water-sewage separation device for self-flowing drainage tunnel of pumped storage power station

The invention discloses a water-sewage separation device for a self-flowing drainage tunnel of a pumped storage power station, and particularly relates to the technical field of water-sewage separation. The water-sewage separation device comprises a self-flowing drainage tunnel pipe, one side of the self-flowing drainage tunnel pipe is fixedly communicated with a drainage frame, the bottom end of the drainage frame is fixedly communicated with a first bottom frame and a second bottom frame, and the interior of the drainage frame is fixedly connected with a square filter screen plate; a plurality of activated carbon plates are arranged on one side of the square filter screen plate, a cleaning assembly is arranged on the other side of the square filter screen plate and comprises a motor, a lead screw, two connecting plates and a bristle plate, and the motor is fixedly installed at the top end of the drainage frame. The motor rotates forwards to drive the lead screw to rotate, so that the bristle plate is driven