［Objective］ To develop environmentally friendly antifouling coatings with excellentstatic antifouling performance.［Methods］Using low toxic organic bismuth as a catalyst to synthesize aresin with degradable a main chain and low surface energy，through a reaction between poly（lactic-co-glycolic acid）（PLGA）polyol，hydroxyl-terminated siloxane and isocyanate. Subsequently，antifoulingcoating were prepared. The structure and molecular weight of the resin were characterized by Fouriertransform infrared spectroscopy（FT-IR）and gel permeation chromatography（GPC），while the coatingproperties such as adhesion，water contact angle，anti-algal performance，self-polishing rate and actual marine antifouling efficacy were systematically evaluated.［Results］ The adhesion of the obtained coating was more than 1 MPa，and the initial water contact angle was 100° -110°，which had both mechanical strength and hydrophobicity. Additionally，the degradation rate of PLGA main chain wasfaster at the initial stage and tended to be stabe after 10 weeks. There were no obvious marine biofoulingaccumulation on the surface after 12 months.［Conclusion］ Through the synergistic mechanism of main chain degradation and siloxane dynamic release，the degradable low-surface-energy antifouling coatings prepared in this study overcame the limitations of traditional antifouling coatings' lack of long-term static antifouling performance and had promising application potential in ships and marineengineering equipment.