The invention discloses a rapid plugging device for a transformer breather. The rapid plugging device comprises a plugging device which can be arranged close to an assembly flange of the transformer breather; the assembly surface of the plugging flange is provided with a sealing ring; corresponding edges of two sides of the plugging flange are separately provided with a rod-shaped slideway which is parallel to the assembly surface of the plugging flange; a movable rod of which the upper section is provided with threads is connected to each rod-shaped slideway through a ferrule on the lower end; each movable rod is sleeved with a clamp ring; and the upper surface of each clamp ring is internally provided with a spring and then is screwed on the corresponding movable rod through an adjustment nut. The rapid plugging device has the characteristics that the structure is simple; use and assembly are convenient; the rapid plugging device is applicable to different breather flanges; breather pipeline plugging can be conveniently realized through simple bayonet-type fixing; and the like.