Sea valve with purging function

The utility model provides a sea valve with a blow-wash function, which comprises a valve rod driven to lift through the rotation of a hand wheel so as to drive a valve disc to lift to open or close the valve; a sealing surface is formed at the joint of the valve seat of the valve body and the valve disc to divide the cavity of the valve body into an inner cavity and an outer cavity; the inner cavity is provided with a discharge port which is sealed by a cock; the outer cavity is exposed to the marine environment and is provided with the other discharge port and the purging valve, high-temperature steam can be introduced to clean marine organisms attached to the inner wall of the sea valve, and the situations of metal deformation, sealing surface deformation, sealing surface failure and valve circulation blockage are avoided. According to the sea valve, the problems that the valve is difficult to use and easy to damage due to the influence of marine organisms under special ocean working conditions are solved,