An integrated aerobic granular sludge wastewater treatment facility comprises a water inlet pipe, an aerating system, a sludge discharge perforated pipe and a cylindrical tank, wherein a tapered reaction barrel is arranged at the center of the cylindrical tank, a cylindrical partition board is arranged on the periphery of the tapered reaction barrel and serves as a first reaction chamber, space between the tapered reaction barrel and the cylindrical partition board serves as a second reaction chamber, and space between the cylindrical partition board and the cylindrical tank serves as a reaction chamber; each reaction chamber is provided with multiple layers of horizontal mesh plates; a short water and gas mixing pipe is arranged at the bottom of the tapered reaction barrel and connected with a gas inlet pipe, a frustum-cone-shaped water inlet cavity is formed in the lower end of the short water and gas mixing pipe, an outlet of the water inlet pipe is horizontally arranged and located in the frustum-cone-shaped water inlet cavity, and a nozzle is mounted at the outlet of the water inlet pipe; and a cone is arranged at the lower end of the cylindrical tank, the bottom of the cone is connected with the sludge discharge perforated pipe, and a water outlet groove is formed in the upper edge of the inner wall of the cylindrical tank. The integrated aerobic granular sludge wastewater treatment facility is simple in structure, convenient to construct and operate, small in occupied area, good in outlet water quality and low in cost and operating cost.