The invention belongs to the technical field of medical apparatuses and instruments and provides a jacking seat. The jacking seat comprises a lower fixing seat and an upper fixing seat, the center of the lower fixing seat is provided with a center hole, and the lower fixing seat is provided with two horizontal pin holes. The upper fixing seat comprises two insertion plates in vertical arrangement, a lock seat is arranged at tops of the two insertion plates, and the lower surface of the lock seat is provided with a convex strip which is positioned between the two insertion plates. The lock seat is provided with a microswitch groove, a lead hole is arranged in the microswitch groove, the top of the microswitch groove is provided with a lower pusher fixing groove, and the outer side of the lower fixing seat is provided with a semi-arc lead groove in vertical arrangement. By adoption of the jacking seat, a syringe can be fixed to an anesthesia instrument to realize injection of anaesthetic in large quantity, and the syringe is convenient to mount, high in stability and capable of moving vertically without deviation in an injection process, so that accuracy and stability in injection are guaranteed.