Electric welding ground wire connector

An electric welding ground wire connector is provided with a U-shaped clamping frame, one side wall of the clamping frame is provided with a through threaded hole, a stud is screwed in the threaded hole, the inner side end, located on the clamping frame, of the stud is connected with a top head, and the outer side end, located on the clamping frame, of the stud is connected with a handle perpendicular to the stud. A ground wire connecting plate is further arranged, a wire fixing bolt used for being connected with a wire nose of a ground wire is connected to the ground wire connecting plate through threads, a rotatable connecting mechanism is fixed to the side wall of the clamping frame, and the ground wire connecting plate is fixed to the other side of the rotatable connecting mechanism. The rotatable connecting mechanism comprises a rotating cylinder cover plate, a fastening screw, a rotating cylinder, a jacking stud, a back tightening nut, a shaft cylinder, a jacking block and a sliding steel ball. Accordin