Due to its outstanding resistance against oxidation and corrosion, MCrAlY ( M = Ni,Co,NiCo) alloy has been widely used as bond coating for thermal barrier coatings or single coating. This paper introduced the MCrAlY coatings and systematically summarized the modification methods for the compositions of MCrAlY coatings, including doping alloy elements or solid particles. Alloy elements were rare elements, such as Re, Hf, Pt, Ta, and the solid particles mainly were CeO₂or Al₂O₃ . Doping with alloy elements and solid particles could facilitate the formation of diffusion barriers in the coatings to decrease the diffusion rate of elements, such as Al, Cr, and change the phase compositions of MCrAlY coatings. This process could effectively reduce the growth rate of TGO, restrain the formation of spinel phases and improve the oxidation resistance of the coatings.