［Objective/Significance］This paper aims to analyze the key revisions in GB/T 31817 —2015，focusing on technological upgrades in wind turbine blade coatings. It proposes optimizedstrategies for coating protection systems to adapt to complex environments，promoting industry development towards high efficiency， environmental friendliness， and long-term durability.［Analysis/Discussion/Progress］ The revision introduced significant updates in several aspects：a corrosion（aging）environment classification system of the coating system on fiber-reinforced polymer（FRP） substrates was established，based primarily on temperature zones，geographical attributes（marine/land）， and annual precipitation. Multiple coating systems，such as polyaspartic ester， waterborne polyurethane，and waterborne fluorocarbon，were added，with detailed dry film thickness requirements for different environments. Performance requirements were enhanced，including improved adhesion，aging resistance，and humidity resistance，along with new key indicators such as elongation at break，rain erosion resistance，low-temperature/humidity cycle resistance，anti-icing contact angle，and mold resistance. The salt spray resistance requirement was removed，while VOC limits were strengthened. Surface treatment methods were optimized，with clear application techniques like roller and blade coating，and additional requirements for maintenance and environmentally friendlyconstruction were introduced.［Conclusion/Prospect］The revised standard achieved comprehensive improvements in environmental adaptability，sustainability，and engineering practicality. However，there were also limitations in the refinement of environmental classification，scientific basis for thickness design， and performance evaluation systems. Future efforts should strengthen research on environmental-agingmechanisms，improve performance evaluation methods，establish full-lifecycle databases，and explorenew materials and technologies for extreme environments to support subsequent standard upgrades. Therevised GB/T 31817—2015 is expected to be promulgated and implemented in 2026.