The work aims to design a kind of PVC gusset plate automatic packaging machine with corrugated board as the packaging material, so as to achieve the automatic packaging of PVC gusset plate. Firstly, the total function of the PVC gusset plate automatic packaging machine was determined in black box method based on functional analysis. Then the total function was decomposed into three sub functions: wrapping, tape sealing and conveying. The solutions of the sub function were solved and the optimal solution of packing machine was selected from the solutions of sub functions. Finally structure of packing machine was designed according to the optimal solution. The packaging machine could achieve the automatic packaging of PVC gusset plate arbitrarily from 3 m to 7 m long. In the experiment, 83.6% of packaged products met the packaging requirements, and the average time was 55 s for every packaging of 7 m long PVC gusset plate. By improving the production efficiency and saving the manpower, the PVC gusset plate automatic packaging machine provides reference for the packaging equipment design of large plate corrugated board.