［Objective］ To address the issue of poor static antifouling effect of traditional antifouling coatings.［Methods］ Using tetrabutyl titanate as a catalyst，lactic acid，glycolic acid， caprolactone and 1，4-butanediol were polymerized to synthesize a main-chain-degradable antifoulingresin. The antifouling coating was subsequently prepared from this resin. The structure of the resin wascharacterized by Fourier Transform Infrared Spectroscopy（FT-IR） The physical properties of the coating，such as drying time，flexibility，and adhesion，were measured..The comprehensive performanceof the coating was systematically evaluated by measureing its copper ion release rate，self-polishingrate，and actual marine antifouling performance.［Results］ When lactic acid，glycolic acid and caprolactone were combined in a specific ratio，the resin exhibited optimal performance. The marineantifouling coating formulated from this resin demonstrated excellent adhesion and a stable，long-lasting polishing rate. After a 12-month of shallow-sea hanging plate test，the coating surface showed no obvious marine organism adhesion， demonstrating significant antifouling performance.［Conclusion］The main-chain-degradable marine antifouling coatings developed in this studysuccessfully overcame the limitation of unsatisfactory static antifouling performance in traditional self-polishing coatings. The coatings can be widely used in ships，offshore platform underwater structures， port terminals and other marine installations，indicating broad prospects in the field of marine engineering.