Abstract: Polyaniline (PANI) coatings have excellent anticorrosion performance and a broad prospect in the application of metal corrosion areas.From the prospect of the structure and properties of PANI,the article reviews four methods of preparation of PANI anticorrosive coatings,and then points out that the composite method is the main trend in the development of preparation technologies.The prospect over the developing trend of preparation technologies for PANI anticorrosive coating system is made in the end.