Finish rolling pipe inner wall polishing machine

The utility model relates to the technical field of finish rolling pipe inner wall polishing machines, in particular to a finish rolling pipe inner wall polishing machine which comprises a base, a polishing device slidably connected to the left side of the base and a dust suction device slidably connected to the right side of the base. Three groups of transverse side-by-side grooves are formed in the middle of the base, and a controller is arranged on the side surface; a group of movable plates are arranged in the middle of each group of grooves; the bottom of the movable plate is connected with an electric cylinder output shaft through a movable part; the electric cylinder is fixed at the bottom of the base; the right side of the dust suction device is connected with an output rod of the first cylinder. The left side of the polishing device is connected with an output rod of the second cylinder. The controller is electrically connected with the first air cylinder, the second air cylinder, the electric cylind