The work aims to obtain the static C-δm curves of luffa sponge materials by research, to provide theoretical basis and experimental data for the calculation of the luffa sponge used as the cushion material. GB 8168—1987 testing method of static compression for package cushion materials was referred to. Different groups of specimens were tested on the electronic universal tester. The influence of such factors as force direction, size, humidity and structure on the cushion materials was studied. The static cushion properties of such materials and other cushion materials (polyester sponge and corrugated paperboard) were compared. The force-displacement curves and the stress-strain curves of the luffa sponge materials were obtained, and the C-δm curves were obtained by calculation. As a natural material featured by excellent cushion property and environmental protection, luffa sponge can be completely degraded. The whole luffa sponge cylinder has the similar cushion property as corrugated paperboard and honeycomb paperboard when it is under load along the axis. The single-layer outer wall material of luffa sponge can be overlapped and laterally loaded. In this case, it has the similar cushion property as polyester sponge, even better when under larger load. The cushion property of the luffa sponge with inner core removed is superior to the whole luffa sponge cylinder. It is completely feasible to replace other cushion materials with luffa sponge.