Processing device for air inlet cylinder cover

The invention discloses a processing device for an air inlet cylinder cover. The processing device comprises an automatic sand grinding machine device and a paint spraying device which are sequentially joined to each other, wherein the automatic sand grinding machine device is composed of an abrasive belt, a rack, a driving wheel and a driven wheel; the driving wheel and the driven wheel are horizontally arranged on the rack; the abrasive belt wraps the outer edges of the driving wheel and the driven wheel; material stopping plates are transversely arranged above the abrasive belt; the two ends of each material stopping plate are fixed to the rack on the two sides of the abrasive belt; an interval is left between the bottom end of each material stopping plate and the upper surface of the abrasive belt; the paint spraying device is composed of a bracket; a transportation sliding rail is arranged at the upper end of the bracket and is provided with a moving lifting hook; a frame-shaped hanger is arranged at the