Abstract: A penetration model for projectile with ribbed head penetrating into concrete target is established, based on dynamic spherical cavity-expansion theory of the concrete material and three-staged theory composed of crater, tunnel and plug. Compared with the oval-shaped projectile, the projectile with ribbed head has characteristics of lower residual velocity, larger axial overload and less inadequate penetration capacity. Finally, the influences of structural parameters are analyzed, including the number,width and height of ribs.