The invention discloses an air-cooling type grain husking grinder. The air-cooling type grain husking grinder comprises a grinder box, a feeding opening, a first motor, a second motor, a discharging opening and support pillars. The first motor is fixedly connected to the upper surface of the grinder box. A rotating shaft is fixedly connected to the shaft extension end of the first motor. A fixing rod is fixedly connected to the rotating shaft. The fixing rod is sleeved with a roller. A sieve plate is arranged below the roller. An outer grinding barrel is arranged below the sieve plate. An inner grinding barrel is arranged inside the outer grinding barrel. The second motor is fixedly connected to the lower surface of the grinder box. A grinding shaft is fixedly connected to the shaft extension end of the second motor. The outer wall of the grinder box is sleeved with a cooling box. A spiral plate is fixedly connected to the inner wall of the cooling box. An air blower is fixedly connected to the side wall of the corresponding support pillar. Grains on the sieve plate are ground into pieces and husked through the roller; the inner grinding barrel cooperates with the outer grinding barrel to grind the grains; the grinding contact area is large, and the grinding effect is good; and air is blown into the cooling box through the air blower, so that the grinder box is cooled.