A review was provided of the current status as well as progress and achievements in domestic research of micro-arc oxida-tion of Me alloys and Al alloys. It was pointed out that as a kind ofnew technique for surface treatment of metals,micro-arc oxidation (MAO) could be used to in-situ form ceramic coatings on the sur-face of some non-ferrous metals such as Al,Mg and Ti. It had theadvantages of simple procedures,environmentally friendly process and excellent performance of anodic oxidation coatings,which ma...