Abstract: The 3 m drop impact of semi-armor-piercing cluster warhead is simulated by nonlinear finite element software ANSYS/LS-DYNA and a verification test is conducted. The structural distortion and the acceleration of explosive are obtained under different conditions. The results show that the acceleration of projectile explosive is the largest when the large end of the warhead falls vertically downward, which provides guidance for the following experiment. The simulated results agree well with the experiment data.