The contents inside can cause local shape changes in the pulp molded structure units, leading to variations in their performance. To provide data support for the design of pulp molded cushioning, taking the regular square prism pulp molded structure unit as an example, a series of non-standard square prism structure units were constructed along the height and top surface edge length directions. Using ANSYS Workbench/LS-DYNA and experimental testing methods, the variation laws of the cushioning performance of the non-standard square prism structure units under different heights and cutting ratios were studied, with the corresponding database established. The research shows that as the cutting ratio increases, the maximum load-bearing capacity of the square prism structure gradually increases. In the process of gradually reducing the height, the total energy absorption in the linear elastic deformation stage shows an increasing trend and gradually tends to stabilize. The load-bearing capacity database of the constructed non-standard square prism structure units can provide reference for optimizing the design of pulp molded cushioning.