Typical anti-ship weapon and large-scale auxiliary military ship are chosen as the investigated subjects and the damage effect is analyzed by LS-DYNA.The results indicate that numerical experimental methods has high precision which meets engineering demand.The crevasse and plastic deformation occur under the air explosion load and the area is in circular.Damage style is different between the structure near the explosion and the structure away from the explosion and also different is the damage effect of different parts which is related to the structure form.