Polishing device for automobile part machining

The utility model discloses a polishing device for automobile part machining. The polishing device comprises a base, a positioning shaft is fixedly connected to the base, a containing ring is fixedly connected to the positioning shaft, a polishing piece and a driving piece are arranged on the positioning shaft, and the driving piece drives the polishing piece to rotate to polish automobile parts. The polishing part comprises a rotating ring rotationally connected with the positioning shaft, lower polishing plates are symmetrically and fixedly connected to the rotating ring, a plurality of telescopic rods are fixedly connected to the two lower polishing plates, the corresponding telescopic rods are fixedly connected with a mounting frame, the mounting frame is hinged to an upper polishing plate, a semi-ring body is fixedly connected to the upper polishing plate, and the semi-ring body is fixedly connected to the lower polishing plate. The corresponding semi-ring bodies are fixed through locking devices; accord