The invention discloses a discharging production line in the producing and machining process of a chain. A rack is included; a clamping and rotating conveying mechanism, a cut-off mechanism and a circulating conveying belt mechanism are erected on the rack; the clamping and rotating conveying mechanism comprises a fixed base which is provided with a three-jaw chuck type rotating device; a feeing mechanism is erected at the feeding end of the three-jaw chuck type rotating device; the cut-off mechanism is erected at the discharging end of the three-jaw chuck type rotating device, and comprises aconveying lead screw arranged on one side of a conveying line; a moving base is screwed onto the conveying lead screw; a feeding lead screw perpendicular to the moving direction of the moving base iserected on the moving base, and is provided with a cut-off tool base used for cutting off a chain bar material; a cut-off tool is installed below the cut-off tool base; and the circulating conveyingbelt mechanism used for material receiving and conveying is installed at the discharging end of the cut-off mechanism. The discharging production line in the producing and machining process of the chain meets the conveying and material breaking requirement, it is guaranteed that the end face of a fracture surface is flat, the subsequent end face welding requirement is met, and by increasing the distance between rod materials after material breaking, the operation continuity is good.