Mixing and blending machine for powder coating

The utility model discloses a powder coating mixing and blending machine which comprises a barrel body, a reinforcing sleeve is fixedly arranged on the lower side face of the barrel body, the inner side face of the reinforcing sleeve is connected to the peripheral face of the barrel body through a plurality of reinforcing ribs, a fan is fixedly arranged on a cover plate, an air outlet of the fan is right opposite to a feeding hole, and an air outlet of the fan is right opposite to a discharging hole. According to the utility model, the reinforcing sleeve is additionally arranged outside the barrel body to structurally reinforce the barrel body, so that vibration generated during stirring in the barrel body is reduced; in order to reduce the influence of heat generated during stirring on the powder coating, heat dissipation liquid is injected between the barrel body and the reinforcing sleeve; the fan is additionally arranged near the feeding hole of the cover plate in the barrel, the fan can selectively blow