Shield main drive sealing device dismounting tool and dismounting method

The invention relates to a dismounting tool and a dismounting method for a shield main drive sealing device, and belongs to the field of shield machine maintenance equipment. According to the technical scheme, the dismounting tool for the shield main drive sealing device comprises a sealing ring dismounting tool body and a gauge ring dismounting tool body, the sealing ring dismounting tool body comprises a first supporting plate, a guide sleeve is arranged in the middle of the first supporting plate, a T-shaped rod is installed in the guide sleeve, and the vertical part of the T-shaped rod penetrates into the guide sleeve; pointed-end self-tapping threads are arranged at the lower end of the vertical part, and positioning bolts are arranged at the two ends of the first supporting plate correspondingly. The gauge ring dismounting tool comprises a second supporting plate, a through hole is formed in the middle of the second supporting plate, a screw rod is connected into the through hole in a penetrating mode,