Welding machine with high welding precision

The utility model relates to a welding seam machine with high welding precision, which comprises a workbench, a positioning mechanism for positioning a workpiece is arranged on the upper surface of the workbench, two side plates are fixed on the upper surface of the workbench, a protection mechanism for protecting workers is arranged on the right side of the side plate on the right side, a top plate is fixed on the upper surfaces of the side plates, and the top plate is fixed on the upper surface of the workbench. A displacement device is fixed to the upper surface of the top plate, a welding machine body is fixed to the lower surface of the displacement device, and the positioning mechanism comprises two supporting plates fixed to the upper surface of the workbench. According to the welding machine with the high welding precision, two workpieces are fixed at the same time through a first air cylinder, a supporting plate, a supporting rod, a positioning plate, a positioning seat and four rotating shafts under