Notch polishing device for PE water supply pipe production

The utility model discloses a notch polishing device for PE water supply pipe production, which comprises a main body, a notch polishing part for a PE water supply pipe and a clamp part for clamping the PE water supply pipe, the grinding part comprises a supporting rod arranged on one side of the main body, a sliding plate arranged on the outer surface of the supporting rod in a sleeving mode, a first motor, a rotating disc arranged on one side of the first motor, three fixing columns arranged on the outer surface of the rotating disc and a grinding cylinder arranged at one end of each fixing column, and the three fixing columns are fixedly connected with the rotating disc and the grinding cylinder correspondingly; the supporting rod is movably connected with the sliding plate, the length of the sliding plate is smaller than that of the supporting rod, the PE water supply pipes with different thicknesses can be polished by arranging the notch polishing part used for polishing the PE water supply pipes and the