Automatic grinding and polishing all-in-one machine for metal tube of optical sighting device

The utility model relates to the technical field of grinding and polishing all-in-one machines, in particular to an optical sighting device metal tube automatic grinding and polishing all-in-one machine which comprises a workbench, a driving roll shaft and a driven roller which are rotationally installed at the top end of the workbench, a side plate is arranged on one side of the top end of the workbench, and a top plate is fixedly installed at the top end of the side plate. A strip-shaped groove is formed in the top plate, rectangular blocks are slidably mounted in the strip-shaped groove in the top plate, and a polishing assembly and a grinding assembly are arranged at the bottom ends of the two rectangular blocks correspondingly. The auxiliary mechanism is arranged, a second electric telescopic rod pushes a second sliding block to slide in the supporting plate, a combined block enters a metal pipe to be ground and polished, the front section of the combined block is a grinding wheel, the rear end of the co