Abstract: The local impact dynamic characteristics of X-type lattice sandwich structure were studied by using the drop weight impact test, and the effects of different parameters on the impact performance were analyzed. The results show that the impact failure process roughly goes through four typical stages: The overall bearing force stage, the upper panel failure stage, the lower panel stress strengthening stage and the lower panel failure stage. The impact velocity and panel thickness have great effects on the impact peak load and energy absorption of the X-type lattice sandwich structure. The core thickness has little effect on the impact peak load and energy absorption of X-shaped lattice sandwich structure, while the core angle has a certain effect on the impact peak load and energy absorption of X-shaped lattice sandwich structure. The local impact dynamic behavior of the X-type lattice sandwich structure was numerically simulated by finite element method. The reliability of the finite element model was verified by the comparative analysis of failure modes and force-time curves.