Energy-saving efficient corrugated board preheating device

The utility model discloses an energy-saving efficient corrugated board preheating device which aims at solving the problem that dust on the surface of corrugated paper cannot be cleaned when a preheater conducts preheating work. According to the technical scheme, the paper preheating device is characterized by comprising a machine box and a preheating cylinder arranged in the machine box, a paper inlet and a paper outlet are formed in the two sides of the machine box respectively, the paper preheating device further comprises a sliding plate, the sliding plate is located above the paper inlet and comprises a sliding part and a cleaning part, and the sliding part and the cleaning part are detachably connected through a connecting piece; the sliding part is in sliding connection with the side wall of the case through a sliding piece, and a limiting device used for fixing the position of the sliding part is arranged on the case. Through cooperative work of the sliding plate, the limiting device and the bristles