The invention discloses a vacuum sealing device capable of utilizing atmospheric negative pressure. A platform bottom plate is arranged on a hearth wall; a bottom hinge is welded to the side surface of the platform bottom plate and is connected with a double-hinged plate through a round steel; the double-hinged plate is connected with a face hinge through a round steel; the face hinge is welded toa cover plate; and the cover plate is arranged on the platform bottom plate so as to move through the hinges, and use is convenient in the operation process.