The invention discloses an automatic production line for detecting the residual torsion of a steel cord, and relates to the field of detection equipment. The automatic production line comprises a rack, a liner module, a four-axis robot, an overturning device, an automatic bending device, a fusing device and a detecting device, wherein the linear module is arranged on the rack along the horizontaldirection; the overturning device and the detecting device are arranged at two ends of the linear module respectively; the four-axis robot is arranged on the linear module, and moves back and forth between the overturning device and the detecting device along the linear module; the automatic bending device and the fusing device are arranged on one side of the linear module along the extended direction of the linear module; the fusing device is arranged close to the detecting device, and the linear module, the four-axis robot, the overturning device, the automatic bending device, the fusing device and the detecting device are electrically connected with the control system respectively.