The utility model discloses a carton bending structure which comprises a base. A vertical plate is arranged on the base, a workbench is fixedly arranged on the base, a pressing plate is hinged to the end, close to the vertical plate, of the workbench, an air cylinder is hinged to the vertical plate, the end of a piston rod of the air cylinder is hinged to the pressing plate, a rubber layer is arranged on the lower surface of the pressing plate, and when the pressing plate presses down, the piston rod of the air cylinder reaches the limit position, and the pressing plate is located at the horizontal position parallel to the workbench. The carton bending structure is simple and ingenious in structural design, the production efficiency for cigarettes, cigarette quality and packing speed can be improved, work efficiency and product quality are improved directly or indirectly, operation by operators is facilitated, and work intensity is lowered.