Perfluoro3,6-dioxa-4-methyl-7-octenesulfonyl fluoride (PSVE) is a colorless, transparent liquid of great significance. It stands as a crucial monomer in the realm of organic fluorine polymer materials. Through copolymerization with other monomers under specific conditions, it enables the synthesis of specialized fluorine resins and rubbers with unique functions. Moreover, PSVE is indispensable for preparing perfluorosulfonic acid ion exchange resin, playing a pivotal role in electrochemical applications and contributing to the development of advanced materials.