Reinforcing steel bar butt welding machine capable of changing reinforcing steel bar forming angle

The invention relates to a reinforcing steel bar butt welding machine capable of changing a reinforcing steel bar forming angle. The machine comprises a box body, a rotating shaft I, a driving structure I, two supporting structures, clamping structures and a polishing structure. The top of the box body is provided with a slot, and the slot is communicated with the interior of the box body; the rotating shaft I is horizontally erected in the box body and is provided with two threaded sections with opposite rotating directions; the driving structure I is arranged on the box body and is used for driving the rotating shaft I to rotate; the two supporting structures are vertically arranged in the slot in a penetrating manner, sliding blocks are arranged at the bottoms of the supporting structures and correspondingly installed on the threaded sections, and the clamping structures are arranged at the tops of the supporting structures; the polishing structure comprises a supporting plate I, a rotating shaft III, and