The invention discloses an annealing device of a medium wire drawing machine . The annealing device comprises a base, wherein a first supporting rod, a stretching box, an annealing cylinder, a secondsupporting rod and a driving motor are fixedly connected with the upper surface of the base in sequence from left to right. A first rotating shaft is rotatably connected to the top of the first supporting rod, a wire feeding roller is arranged outside the first rotating shaft in a sleeving mode, and an annealing sleeve is overlapped on the inner wall of the annealing cylinder. A heating coil is arranged inside the annealing sleeve, a first through hole is formed in the left side surface of the annealing sleeve, and a second through hole is formed in the right side surface of the annealing sleeve. The annealing device of the medium wire drawing machine medium wire drawing machine medium wire drawing machine is provided with the annealing sleeve, the heating coil, a heat insulation board, aspray head, a water distribution pipe, a water receiving tray, a blower, a water inlet pipe, a water outlet pipe, a first pipe sleeve and a second pipe sleeve so that a copper wire can be annealed atthe same time after being stretched, simultaneous stretching and annealing are ensured, convenience is provided to the use of workers, and the working efficiency is improved.