Tire shaping vulcanizer capable of quickly replacing sealing element of segmented mold cylinder

The utility model discloses a tire shaping vulcanizer capable of quickly replacing a sealing element of a segmented mold cylinder. The tire shaping vulcanizer comprises a segmented mold cylinder fixed on the machine unit of the vulcanizer, wherein a piston rod of the segmented mold cylinder extends to the interior of the machine unit of the vulcanizer, the sealing element of the piston rod is mounted on a cylinder seat of the segmented mold cylinder by a compression ring in a pressing manner, the sealing element comprises an upper support ring, a lower support ring and two or more than two middle sealing rings, the upper and the lower support rings and the middle sealing rings form two semi rings or a multi-sectional ring which can be separated during disassembly and can be combined during replacement by means of inclined notches machined on the support rings and the sealing rings; and the inclined notches on the upper and the lower support rings and the middle sealing rings after replacement are in staggered