［Objective/Significance］Research on the application of polybenzimidazole（PBI）in coatings remains relatively scarce in China，with a notable gap compared to international advancedlevels. Through systematic collation of the current development status and application prospects of PBIin the coatings，this review provides insights and references for relevant technical research andindustrial development.［Analysis/Discussion/Progress］The technical characteristics of PBI in terms of synthesis methods，structural design，performance mechanisms，and functional modification strategies are analyzed. Through comparison with other specialty resins，the performance advantages of PBI in thermal stability，scratch resistance，mechanical strength and chemical stability are comprehensively illustrated.［Conclusion/Prospect］ It is demonstrated that PBI，as a high-performance aromatic heterocyclic polymer，exhibits significant application potential in specialty coatings，particularlydemonstrating irreplaceable value in extreme environment applications such as high-temperature， thermal protection and high-friction scenarios.