The present invention discloses a solid-sealed polar pole with a gas buffer device, the solid-sealed polar pole comprises a static terminal, a polar pole housing, a vacuum arc-extinguishing chamber, an electrical connecting conductor, a moving terminal, a repulsive disk, a closed air chamber, a gas buffer sidewall, a movable conductive rod, an insulating pulling rod, a connecting rod, an opening drive coil, a sliding sealing device, an air outlet, a closing drive coil, a bistable retention structure and an epoxy resin; the device can effectively reduce effective parts of vacuum circuit breakers of an electromagnetic repulsion mechanism, form the solid-seal polar pole, realize practical effect of integration, and improve insulation strength. The solid-seal polar pole applied in the vacuum circuit breakers is easy to use, portable and easy to maintain, and can realize separation and dis-assembly of three polar columns and give full advantages of portability in application of the three vacuum circuit breakers. The device adds a gas buffer structure to the solid-sealed polar pole, eliminates traditional oil buffer components, reduces mechanical collision during usage, prolongs servicelife and enhances structural reliability.