Tin-free self-polishing antifouling coating is the most widely used marine antifouling coating after organic tin self-polishing antifouling coating. It is a hot spot in the research and development of new antifouling coatings at present. In view of this, the antifouling mechanism and antifouling characteristics of self-polishing antifouling coatings were summarized, the application status of tin-free self-polishing antifouling coatings was listed, several new tin-free self-polishing antifouling coatings and their research progress were introduced in detail, and the development prospect and possible development direction of tin-free self-polishing antifouling coatings were put forward.