The invention discloses a process method capable of removing an isocyanate-type flexible anticorrosion composite coating for a power generator. According to the process method, under the condition ofnot using a cleaning solvent, the whole composite coating can be conveniently and quickly removed and has ultraviolet-aging-resistant performance and high water-tolerant performance, and the salt mistcorrosion resistance capacity of the composite coating is more than two times that of a traditional sealing anti-rust material. The process method is easy and convenient to operate, easy to control and wide in application prospect and has an obvious effect. The problem is solved that the finishing surface of a power generator component is rusted frequently under the high-salt-mist, high-temperature and high-humidity exposed environment. The social and economic benefits are obvious.