Stud dismounting tool

The utility model relates to a stud dismounting tool. One end of a tool body is in threaded connection with a fastening end of a stud, the other end of the tool body is in coaxial threaded connection with a locking bolt for locking the stud, and corresponding locking threads are machined on the inner wall of the tool body. The screwing direction of the locking threads and the connection threads are opposite, so that during usage, workers can lock the fastening end of the stud on the tool body through the locking bolt and screw the locking bolt continuously to drive the stud to screw off a connection piece through the tool body, and the stud is then dismounted. As in the whole dismounting process, and the acting force of the tool applied to the fastening end of the stud only comprises threaded connection acting force and locking force, outer threads of the fastening end of the stud cannot be damaged.