<p>To enhance the mechanical energy absorption properties of cellular structures, four novel hybrid honeycomb structures were developed by combining different honeycomb configurations and designing new subunits through modifications to the unit cell geometry. First, experimental tests were conducted to compare the in-plane impact performance of square-diamond honeycomb (SDH) and square-tetra-chiral honeycomb (STH), validating the accuracy of the finite element model. Subsequently, the deformation modes and energy absorption characteristics of the four honeycomb structures were analyzed under identical wall thickness and impact velocity conditions. The results indicate that at an impact velocity of 10&#xa0;m/s, square-concave hexagonal honeycomb (SCHH-I) exhibits higher specific energy absorption (SEA) compared to the other three hybrid honeycombs. Under high-velocity impact, the SEA of the composite honeycomb increases with the rise in impact velocity, with SCHH-2 exhibiting the most significant increase in SEA, reaching its maximum value at an impact velocity of 100&#xa0;m/s. For the STH structure, which demonstrated lower energy absorption, novel honeycomb designs with varying symmetrical configurations were proposed. The research results indicate that under low-velocity impacts, the energy absorption capacity is best for the left–right symmetric design of STH-III and the centrally symmetric design of STH-VI. However, this improvement does not confer an advantage under high-speed impacts. Overall, the symmetric arrangement strategy can enhance the impact resistance of the honeycomb structure.</p>