Abstract: In order to analyze the protection performance of nuclear containment under the impact of commercial aircraft, the refined finite element models of aircraft MA600 and nuclear containment are established in this paper. The impact process is simulated by using the commercial finite element software LS-DYNA. The structural integral displacement and local failure modes of the containment are analyzed. The results show that the peak load of MA600 on the nuclear containment during the whole process is mainly caused by the impact of wings and engines; the impact load-time curve of the MA600 is similar with that of the Phantom F4 and Boeing 707, but the time duration and the peak load are different; under the normal patrol velocity, the local deformation of nuclear containment will exceed the allowance value in current criterion, as a result, the obturation performance of nuclear containment will be affected due to the serious local damage; the actual dynamic behaviour and failure of nuclear containment cannot be evaluated by applying the impact load directly on the nuclear containment.