The invention discloses a waste wire rod paying-off straightening mechanism. The mechanism aims at solving the problems that in the waste wire drawing process, the wire clamping phenomenon easily appears, a paying-off disc is pulled down, the waste wire is broken, and the potential safety hazard is large and comprises a support and a paying-off disc, an upper wire pulley and a lower wire pulley are arranged at the upper end of the support, a vertical sliding rod is connected to the support, the sliding rod is arranged between the upper wire pulley and the lower wire pulley, a lifting sliding block is arranged on the sliding rod in a lifting manner, a balancing weight is hung on the lower end of the lifting sliding block, a lifting pulley is arranged on the lifting sliding block, a stroke switch allowing the lifting sliding block to make contact is arranged at the position, above the lifting sliding block, on the support, the position, close to the upper wire pulley, of the support is connected with a rail frame, a movable frame is mounted on the rail frame in a sliding manner, a buffer spring is arranged between the upper end of the rail frame and the movable frame, a wire ring is arranged on the movable frame, and a husking wheel and a wire base are arranged at the position, close to the lower portion, on the support.