Brake disc pneumatic tool

The utility model relates to the technical field of tools, in particular to a brake disc pneumatic tool which comprises a base, supporting seats are fixedly connected to the left side and the right side of the upper end of the base, a top plate is fixedly connected to the upper ends of the two supporting seats through screws, and ten mounting grooves are formed in the upper end of the top plate. Ten sets of air cylinders are fixedly installed at the upper end of the base, the output ends of the air cylinders penetrate through the top plate and extend out of the upper end of the top plate, the upper ends of the output ends of the air cylinders are fixedly connected with first connecting shafts, the first connecting shafts are sleeved with positioning plates, and first connecting holes matched with the first connecting shafts are formed in the positioning plates. Outer threads for being in threaded connection with limiting nuts are arranged on the surface of the first connecting shaft and located at the upper e