The work aims to study the cushioning performance of circular honeycomb filled with regular polygons, establish the impact finite element models of circular honeycombs filled with different regular polygons and analyze the influence of regular polygons filling on cushioning performance of circular honeycomb. Ansys/LS-DYNA was used to establish the finite element analysis models of circular honeycombs filled with regular trilateral, quadrilateral, pentagon and hexagon and the six-level grade method was used to evaluate and analyze their mechanical properties, deformation modes and energy absorption characteristics under different impact velocities in the axial direction. The regular polygon and the circular honeycomb had a strong coupling response, so that the contacting load and the total energy absorption value of the combined structure were greater than the sum of the two individual impact values. The six-level grade of the circular honeycomb structure filled with regular hexagon was A, which was better than that of other combination types and the evaluation results of circular honeycombs filled with different regular polygons at different impact speeds were the same roughly. There were three deformation modes of the honeycomb filled with regular hexagons under impact load, which was changed with the impact velocity, but slightly affected by honeycomb wall thickness. As the impact velocity and thickness increased, the dynamic peak stress, total energy absorption and specific energy absorption were all improved to a certain extent. Under the combined effect of coupling effect and dynamic impact load, the dynamic mechanical properties of the circular honeycomb filled with regular hexagon are more excellent than the other three structures. As the thickness of the honeycomb and impact velocity increase, the load-bearing capacity and energy-absorbing capacity of the circular honeycomb filled with regular polygons have been enhanced.