The utility model provides a quick plugging device of transformer respirator, it includes the shutoff flange that can hug closely transformer respirator mounting flange, dispose a sealing washer on the installation face of shutoff flange, the both sides corresponding side of shutoff flange is along respectively being provided with a shaft -like slide rail parallel with shutoff flange mounting face, and an upper segment sets up the screwed movable rod and meets through lower tip lasso on the shaft -like slide rail, the movable rod on emboliaed a rand, connects soon on the movable rod with the rating nut after putting into a spring above the rand, shutoff flange center seted up the step through -hole, the large aperture pore that wherein is located shutoff flange mounting face one side is provided with the internal thread, after cup that an inner chamber was equipped with the drier inserts and passes aperture footpath pore from the large aperture pore, its rim of a cup turn up end limit crimping on large aperture pore base to it keeps apart the otter board and connects soon in the large aperture pore and compress tightly to have the external screw thread with one the rim of a cup end edge that turns up, the air vent has been seted up on the cup, it has simple structure, uses simple to operate, and is applicable in different respirator flanges, can conveniently realize characteristics such as respirator pipeline plugging through simple bayonet fixing.