Based on stress-strain curves of honeycomb paperboards with different thickness-to-length ratios under static compression in different reiative humidity, the energy-absorption diagrams were molded and constructed, which included the information of strain rates, honeycomb structures and relative humidity conditions. The results showed that the best energy-absorbing point shifts to the upper right with the increasing thickness-to-length ratio of honeycomb paperboard, and the energy-absorption capacity per unit volume increased; the energy-absorption point shifts to the lower left and the energy-absorption capacity per unit volume decreases with the relative humidity incrcascs.