The utility model relates to a gear pull-out structure which is used for dismounting a gear provided with at least one threaded hole from a rotating shaft. The gear pull-out structure comprises a base body, an ejection bolt and at least one fastening bolt, wherein the base body is provided with a threaded through hole and at least one limit through hole; the ejection bolt is matched with the threaded through hole, penetrates in from one side of the threaded through hole, penetrates out from the other side, and is used for propping against the rotating shaft; and the at least one limit through hole is matched with the threaded hole of the gear, penetrates in from one side of the limit through hole and penetrates out from the other side, and a bolt head of the fastening bolt is clamped in the position of the limit through hole and used for being connected with the gear. With the adoption of the gear pull-out structure provided by the utility model, the gear can be dismounted from the rotating shaft without dismounting other accessories around the gear, so that the time for dismounting the gear is greatly saved, and the work efficiency is improved; and meanwhile, other accessories are not required to be dismounted, accordingly, abrasion for other parts is reduced, and the service life of an overall machine is prolonged.