The paper aims to design an automatic bundling device to solve the problem of automatic bundling of cardboard at the rear end of corrugated board production line. In response to the requirements such as tying ropes, eco-nomical, lightweight and flexible plastic ropes were selected to design, test and produce a mechanism for winding and knotting corrugated cardboard. The designed automatic roping knotting mechanism was driven by motors and cylinders. It replaced the manual corrugated cardboard rafts, reduced the labor intensity and improved the efficiency. And it fits the requirements for the corrugated board bundling, reduces the labor cost, improves the production efficiency, and has a good application prospect.