Based on the effect of the shape of rod armor piercing warhead on armor penetration, a new armor piercing bullet whose head structure is the combination of multilayer armor piercing blocks and amour piercing ring was designed. Using LS-DYNA, the penetration against three-layer spaced metal plates was numerically analyzed. Through analyzing penetration performance under different velocities, it can be found that the bullet has a large-scale adaptive velocity and the intensity of compress stress wave is reduced; the second projectile is well protected and the ricochet trend is weakened effectively. The simulation results are referable to bullet design.