The attachment of marine fouling organisms has been affecting the development of marine transportation and marine engineering industry.In order to alleviate the problems caused by the attachment of marine organisms,anti-fouling coatings are widely used,and tin-free self-polishing coatings(TFSPC)have become the mainstream product in the anti-fouling coatings market as a result of their excellent anti-fouling performance and low toxicity.In this paper,the working mechanism,composition and current application of tin-free self-polishing coatings are discussed in detail.