Abstract: Negative Poisson's ratio materials, characterized by their unique mechanical properties and remarkable energy absorption capacity, have shown significant potential in diverse fields such as aerospace, biomedical, sports wearables, and automotive industries. The influence of design parameters on the deformation mode and quasi-static compression performance of the negative Poisson's ratio structure is studied in depth. By filling polyurethane foam into the 3D negative Poisson's ratio structures, this study examines the impact of the foam filler on the deformation mode and quasi-static compression performance. Experimental results demonstrate that the incorporation of polyurethane foam enhances the load-bearing capacity and energy absorption performance of the structures.