Abstract: Auxetic honeycombs have drawn broad attention due to their lightweight properties, distinguished impact resistance, and energy absorption capacity. With the finite element method, the overall in-plane dynamic performance of an arc-star-shaped honeycomb (ASSH) is investigated, and the effects of impact velocity on the deformation modes, dynamic response, and energy absorption of ASSH and traditional star-shaped honeycomb (SSH) are compared. This study shows that the ASSH demonstrates superior impact resistance than the SSH under given conditions. Besides, the effects of wall thickness and arc angles on energy absorption of ASSH are explored. The findings herein offers valuable insights for the design of materials and structures with negative Poisson’s ratio.