Efficient sewage disposal system for hydropower station reservoir area

The efficient sewage disposal system comprises a water retaining dam body and a sewage blocking net arranged on the upstream of the water retaining dam body, the sewage blocking net comprises an inclined sewage guiding section, a horizontal section and a vertical section which are of an integrated structure, and a sewage gathering area is formed among the horizontal section, the vertical section and the riverway edge. A belt conveyor is obliquely arranged between the dirt gathering area and the water retaining dam body, the higher end of the belt conveyor is fixed to the water retaining dam body, the lower end of the belt conveyor extends into the dirt gathering area, a plurality of pushing plates are arranged on a conveying belt of the belt conveyor at intervals, and a dirt storage groove is formed in the position, below the higher end of the belt conveyor, of the water retaining dam body. The sewage disposal device is wide in application range, high in working efficiency and good in sewage disposal effect,