Automobile exhaust pipe welding frame

The utility model discloses an automobile exhaust pipe welding frame which comprises a base, movable plates are arranged at the two ends of the upper portion of the base, a supporting seat is fixedly connected to one end of the upper portion of each movable plate, a positioning ring is arranged in the supporting seat in a penetrating mode, and a rotating shaft is arranged at the connecting position of the positioning ring and the supporting seat. The bottom of the inner side of the positioning ring is fixedly connected with a second arc-shaped clamping piece, the two ends of the positioning ring are in threaded connection with screws, and the other ends of the screws are rotationally connected with first arc-shaped clamping pieces. The automobile exhaust pipes can be fixed and clamped by arranging the supporting seat, the positioning ring, the screw rod, the first arc-shaped clamping piece and the second arc-shaped clamping piece, so that the stability of the two automobile exhaust pipes during welding is ens