Loosing device for steel wire rope

The utility model relates to an unscrewing device of steel wires. Two tool boxes of the unscrewing device are cascaded through a long shaft and can slide oppositely, a table vice is fixed on one tool box, and a supporting frame is fixed on the other tool box; the supporting frame is provided with an opening cylinder in the upper part thereof, the inner shaft with a long groove at the center thereof is slidingly matched with and sleeved in the opening cylinder, and the width of the opening of the opening cylinder and of the long groove of the inner shaft is matched with the outer diameter of a steel wire cable; the shoulder of the inner shaft tightly close to the end part of the opening cylinder is a rectangular head at one end, and the outer column surface at the other side of the shoulder of the inner shaft is provided with a groove and a screw in which a bolt is arranged; the opening cylinder is provided with a positioning device in the middle; the tension rod of the positioning rod is slidingly matched wit