In order to study the effect of obliquity on a projectile perforating concrete targets, a set of oblique perforation experiments of concrete targets by the projectiles were conducted. The ballistic trajectory, yaw angle, residual velocity and trajectory angle after the projectile perforating the target were acquired using foil screen targets and a foam plate. The experiment results indicate that a yaw angel and a trajectory angle after the projectile perforating the target were induced. It is found that the target damage can be divided into three phases: the crating phase in front of the target, the tunneling phase in the middle of the target, and the shear plugging and spalling phase in the back of the target. It is also found that an inclination crater was formed in front of the concrete target.