The invention relates to a device for processing belt holes. The device comprises a rack. A locating groove used for accommodating a belt is formed in the rack. The rack is further provided with punch pins and a control mechanism used for controlling the punch pins to move in the vertical direction. The punch pins are located above the locating groove. The device further comprises a heating device used for controlling the punch pins to be heated. By adopting the technical scheme, the device for processing the belt holes can burn and remove leather scraps on inner walls of holes when used for punching the belt holes, so that the inner walls of the holes are more smooth, cannot scratch hands and wear clothes.