Self-alignment end facing machine

The utility model discloses a self-aligning end facing machine which comprises a box body, two sets of fixing bases are symmetrically arranged on the top of the box body, first sliding grooves are formed in the tops of the two sets of fixing bases, first sliding blocks are connected into the first sliding grooves in a sliding mode, first air cylinders are installed on one sides of the fixing bases, and the output ends of the first air cylinders are connected with the first sliding blocks. A machine box is arranged at the top of the first sliding block, bearings are arranged at openings in the two sides of the machine box, a rotating shaft is arranged between the bearings, a tool bit is arranged at one end of the rotating shaft, a waste collecting opening is formed in the top of the box body, a first fixing base is arranged on the side, close to the waste collecting opening, of the top of the box body, and a second sliding groove is formed in the top of the first fixing base. The top of the second sliding bloc