During missile launch and penetration, the internal testing circuit components of the missile system are subject to high g overload. The work aims to apply buffer protection to the circuit components to improve the survival of the circuit components. The air gun device was used to launch steel bullets to impact the base under high g loading, so as to study the impact resistance characteristics of aluminum alloy thin-walled tubes. Based on LS-DYNA, the effect of thin-walled tube wall thickness and impact velocity on the high g impact was studied. As the impact velocity of the steel ball increased, the acceleration amplitude of excitation (AAE) at the base gradually increased. The buffering efficiency of single-layer tubes (CirT) and multi cell tubes (MT) reached 91.0% and 74.7%, respectively. The error between the acceleration amplitude of excitation and the acceleration amplitude of response (AAR) obtained from numerical simulation and experimental results was not more than 5%, and the wall thickness of thin-walled tubes had almost no effect on the excitation acceleration. The results obtained in this article have strong guiding significance for the high g impact protection of lightweight components.