Auxiliary device and method for replacing gas relay of transformer

The invention provides an auxiliary device and method for replacing a transformer gas relay, the auxiliary device comprises two bidirectional ratchet mechanisms, a first rack and a second rack, the first rack and the second rack are arranged in parallel, and two front half rings are arranged between the first end of the first rack and the first end of the second rack; a base is arranged between the front half ring and the second end in a sleeved mode, and the bases are connected with the first rack and the second rack in a sliding mode. Two rear half rings are arranged between the bases; the two ends of the two rear half rings and the two front half rings are detachably connected to form a circular ring, and the circular ring is used for being clamped on a corrugated pipe connected with a transformer gas relay in a sleeving mode. Ratchet wheels of the two bidirectional ratchet wheel mechanisms are respectively meshed with the first rack and the second rack through corresponding bases; and the bidirectional ra