Abstract: Three dimensional numerical simulation of W-alloy kinetic energy(KE)projectile penetration into multilayered ceramics was conducted combined with experimental investigations.The numerical results agree satisfactorily with experiments in depth-of-penetration(DOP)into the backup steel target and the fragment shape.Each layer of the ceramics has an infundibulate fragmentation with similar shape.The kinetic energy and velocity decreases with the increase in the ceramics layers.The resistant performances of multilayer and monolayer ceramic targets with the same thickness are compared.It is shown that their damage behaviors are different.The multilayer ceramic is better than the monolayer ones,but only in certain thickness range.