Al, Ti/Al coatings on U substrates were prepared by repeated Ar+ bombardment-magnetron sputter ion plated (MSIP). The surface morphology, cross-sectional morphology, interfaces, wear-resistance, and corrosion resistance have been investigated by Auger electron spectroscopy (AES), scanning electron microscopy(SEM), electrochemical test, and wearing test respectively. The results showed that the surface morphology of Al, Ti/Al coatings were constituted of fine grains with smooth appearance. The more wide co-existence Interface of coatings and substrates were prepared by repeated Ar+ bombardment-magnetron sputter ion plated (MSIP). The degree of protection of Uranium against corrosion and wear-resistance plated of Ti/Al coatings by repeated Ar+ bombardment-MSIP is superior to that of sole Al coatings.