The invention discloses a corrugated paper cutting apparatus. The apparatus comprises a conveyer, wherein the two sides of the conveyer are arranged on a frame, a support plate is arranged upwardly onthe frame, a knife rest is slidably connected to the inner side of the support plate, a connecting rod is hinge-connected on the upper side of the knife rest, the upper end of the connecting rod is hinge-connected to a crankshaft, the crankshaft is connected to the rotating member, a knife blade is arranged on a lower side of the knife rest, a knife seat is arranged directly below the knife plate, an upper surface of the tool rest is flush with an upper surface of the conveyer belt on the conveyer, a photoelectric detecting switch is arranged on both sides of the conveyer, the photoelectric detecting switch is located on a feeding direction side of the knife blade, pressure rollers are arranged on both upper sides of the conveyor, and the pressure rollers are fixed on the frame by a length adjustable and height adjustable connecting rod. The corrugated paper cutting apparatus has a good cutting effect, so that the corrugated paper with multiple specifications can be cut, and the cutting length is easy to adjust and control accurately.