Aerobic granular sludge internal circulation type efficient reactor

The utility model discloses an aerobic granular sludge internal circulation type efficient reactor which comprises a reaction box body, an air compressor and a sludge box, a sludge pump is fixedly connected to the center of the top of the sludge box, and a sludge inflow pipe is fixedly connected to the top of the output end of the sludge pump. The center and the bottom of one side of the sludge box are fixedly connected with a first return pipe and a second return pipe respectively; one end, far away from the sludge box, of the first return pipe is fixedly connected with the bottom of the side surface of the reaction box body; a settling pipe is fixedly connected to the center of the outer surface of the bottom of the reaction box, a control valve is arranged in the center of the side wall of the settling pipe, and bottom communicating pipes are fixed to the two sides of the outer surface of the bottom of the reaction box. The stirring rod is arranged in the reaction cylinder, so that the aerobic granular slu