Storage sealing device equipped with pressing component

The invention relates to the field of nuclear fuel storage, in particular to a storage sealing device equipped with a pressing component, which comprises a vertically arranged sealing container; the sealing container is cylindrical, wherein the top of the sealing container is welded with a top cover, and the bottom of the sealing container is provided with a bottom plate; a fuel basket is arranged in a cavity of the sealing container, wherein the inner cavity of the fuel basket is used for arranging a spent fuel assembly; the device further has a pressing unit that comprises a top plate, a base and a middle damping part connected between the top plate and the base, wherein the pressing unit is arranged in the sealed container and located between the top cover and the fuel basket; the upper surface of the top plate abuts against the lower surface of the top cover, and the lower surface of the base abuts against the upper surface of the fuel basket. Compared with the prior art, the capacity of the sealed contai