Inflatable sealing washer

The utility model discloses an inflatable sealing washer which comprises a seat ring, an outer washer body and an inner washer body, the outer washer body and the inner washer body are each provided with an inner cavity, the outer washer body is fixedly arranged on an outer ring of the seat ring, the inner washer body is fixedly arranged on an inner ring of the seat ring, and an inflating valve and an air channel are arranged on the seat ring. The inflating valve is communicated with inner cavities of the outer gasket and the inner gasket through air channels, and a plurality of fixing columns are arranged at the bottom of the seat ring. The inner gasket and the outer gasket are respectively arranged on the inner side and the outer side of the seat ring to form a double-layer sealing ring, so that leakage can be effectively prevented; a plurality of fixing columns are arranged at the bottom of the seat ring, the position of the seat ring is fixed by inserting the fixing columns into the contact face of the pi