Objective To realize the cushioning optimization of multilayer regularly-arranged circular aluminum honeycombs under in-plane crushing loadings with high impact velocities. Methods A finite element model was introduced to obtain the cushioning mechanical parameters, and a simplified energy absorption model was used to evaluate the cushioning performance. Results The model showed that the cushioning performance was related to dynamic plateau stress and dynamic densification strain, and was jointly determined by the impact velocity, deformation mode and configuration parameters. Conclusion Empirical formulas of critical velocity of deformation mode transition, dynamic densification strain and dynamic plateau stress were obtained from the analysis of numerical results, and feasible cushioning optimization methods were introduced in detail.