The four-stage proces of the development of protective caing technology on the outer surface of aerospace vehicles in China since the founding of the People's Republic of China was summarized.Compared with the development status of similar foreign products,taking the relevant aviation special coating material products of PPG and Akzo Nobel as examples,aiming at the defects and future development directions of domestic aviation aircraft outer surface protective coating technology were analyzed,and some ideas were put forward for the development of China's future aviation coatings.From the two application directions of military and civil aircraft,the use characteristics of different functional coating materials were discussed respectively,the pollution resistance,long-term weather resistance,environmental protection characterstics,resistance reduction and weight reduction were analyzí,and the future development trend of the outer surface coating of military and civil aircraft were discussed.