Proton Exchange Membrane (PEM) is one of the core components of hydrogen fuel cells and plays a key role in battery performance. With excellent electrochemical, mechanical and chemical stability, proton exchange membranes can be widely used in fuel cells, water electrolysis, and vanadium redox flow batteries. Due to the high technical content of PEM and the difficulty of development, the domestic market is mainly occupied by foreign products, which has always been one of the "bottleneck" problems in the hydrogen fuel cell industry. In recent years, a large number of policies have been issued at the national and local levels to support the development of the hydrogen energy industry, including the "Technology Roadmap for Energy-saving and New Energy Vehicles" points out that the number of hydrogen fuel cell vehicles in 2025 and 2030 is targeted to be 100,000 and 1 million respectively, and commercial vehicles will begin to realize the transformation of hydrogen power in 2030.