Objective To increase the strength of seven corrugated boxes in the stacking process. Methods Firstly, static analysis of the common corrugated combinations in the market was carried out by Ansys simulation, and excel was used for data processing. The strength of the corrugated combinations was compared. On the basis of choosing the BBE corrugated combination, the author proposed three ways to increase the strength of reinforced corrugated cardboard against the main force flute edge. Theoretical and experimental buckling analysis was performed for the 3 reinforced cardboard and the unreinforced cardboard, the results were compared, and the expansion mode was observed. Results The data was displayed in tabular form, it could be found under the same conditions, the theoretical and experimental results showed that the critical pressure was different in different reinforcing ways. Conclusion Appropriate stiffener could increase the strength of corrugated boxes, and the strength of the external reinforcement was the highest.