The effect of underwater shock wave on different target plates has been studied.An underwater shock wave generator(shock tube) was used to study the interactions between water and different constructed targets which act as shock wave mitigation.Target plates,composed of sandwich of two aluminum sheets with rubber and foam in between,were prepared and studied.For comparison,the target plates composed of triple aluminum sheets were tested.The study includes the testing of the selected plates in water under the effect of different peak pressures and the analysis of the results.The strain gauge data and displacement sensors results showed that the multi-layer plates have higher level of underwater shock wave mitigation than the triple aluminum plates with strain and deflection of nearly 50%. The effect of underwater shock wave generator on shock wave mitigation has been studied. An underwater shock wave generator (shock tube) was used to study the interactions between water and different constructed targets which act as shock wave mitigation. aluminum sheets with rubber and foam in between, were prepared and studied. For comparison, the target plates composed of triple aluminum sheets were tested. The study includes the testing of the selected plates in water under the effect of different peak pressures and the analysis of the results. strain strain data and displacement sensors results showed that the multi-layer plates have higher level of underwater shock wave mitigation than the triple aluminum plates with strain and deflection of nearly 50%.