The invention discloses a micro-arc oxidation technology. According to the micro-arc oxidation technology, two different technical methods, namely a micro-arc oxidation growth method and a micro-arc oxidation exfoliation method are generated according to the difference between the regulated pulse parameter of an external circuit and the interpolar field intensity of an internal electric field; themicro-arc oxidation growth process has the advantages that a protective layer can be formed on the metal surface, and the corrosion-resistant and scratch-resistant surface protective performance canbe achieved; and the micro-arc oxidation exfoliation process has the advantages that atomic-scale layer-by-layer exfoliation can be achieved, and the high-standard machining precision requirement of acomplex-curved-surface-shaped key component can be met. The micro-arc oxidation technology has the advantages that by using the methods, the existing problems of the surface protective performance ofmaterials can be solved, and the requirements of precision machining of the materials can be met.