The invention provides a repulsion operation mechanism. The repulsion operation mechanism comprises a movable iron core and a sealing cavity, wherein the movable iron core is in transmission connection with a switch pull rod; and by the sealing cavity, the movable iron core moves in a reciprocating manner, so that the repulsion operation mechanism is switched off or switched on. When moving to two ends of the sealing cavity, the movable iron core is respectively positioned at a switch-on position and a switch-off position; the movable iron core is a moving plate by which the sealing cavity is divided into two portions; through holes are formed in a switch-off position and a switch-on position or positions close to the switch-off position and the switch-on position on a peripheral wall of the sealing cavity; the inside and the outside of the sealing cavity are connected to each other by the through holes; and buffering media are fed or discharged by the through holes. By the repulsion operation mechanism, quick buffering on switch-off movement and switch-on movement of the switch pull rod can be effectively realized; and the buffering effect is high.