Protective cylinder of reinforcement bar straightening machine

The utility model discloses a reinforcement bar straightening machine protective cylinder, which comprises a base support and a feeding mechanism, a fixing bolt is arranged on one side of the exterior of the upper end of the base support, a fixing table is arranged outside the other end of the fixing bolt, a discharging ring is arranged on one side of the exterior of the upper end of the fixing table, and a limiting bayonet lock is arranged outside one end of the discharging ring. A steel bar frame is welded to the outer portion of the other end of the feeding ring, and the feeding ring is arranged on the outer portion of the other end of the steel bar frame. The protective barrel of the reinforcement bar straightening machine is provided with the feeding mechanism, the feeding mechanism and the feeding ring form a detachable structure through the bolt, so that the protective barrel has a reutilization function, the utilization rate of the protective barrel is improved, when a user passes a reinforcement bar