In this study, Al₂O₃-Pt/YSZ-Pt double layer composite coatings were prepared by cathode plasma electrolytic deposition (CPED) on the high-temperature alloy with a NiCoCrAlY bond-coat. The composite coatings were consisted of a Al₂O₃-Pt film and a YSZ-Pt top-coat, and showed a good adhesion with the metallic bond-coat. It is demonstrated, from the cyclic oxidation test and mechanical properties test, that such coatings possess good oxidation and spallation resistances. These beneficial results can be attributed to the effects: such coatings can inhibit further oxidation of the bond-coat owing to the extremely low oxygen diffusion rate of Al₂O₃-Pt film; the mechanical properties of Al₂O₃-Pt/YSZ-Pt composite coating are improved by the toughening effects of Pt particles.