Multi-Arc Ion plating technology is an improved method of Ion plating and it is a surface coating technology that uses arc as the fountain of vaporizing. It plats rapidly with fine-tissued coat. It can be applied to many aspects such as high-rigidity coating of tools and mould and decoration coating more widely and occupy a more important place. This paper introduces the principle and characteristics of multi-arc ion plating, and on the conclusion of many studies and experiments done in the previous years, this paper also analyses the development and application of multi-arc ion plating technology in some areas. It will offer favorable reference for the study and application of multi-arc ion plating technology in future.