The invention provides a welding machine suspension bracket. The welding machine suspension bracket comprises a fixing frame connected to a base, an upper bridge frame, a sliding bridge frame and a welding machine suspension device. The welding machine suspension bracket is characterized in that the sliding bridge frame and the upper bridge frame are connected with the fixing frame through steering shafts component to form a triangular rotary pair, wherein the triangular rotary pair takes the fixing frame as an axis to rotate; the welding machine suspension bracket is arranged at the front end of the sliding bridge frame through a sliding block, and the welding machine suspension device can slide on the sliding bridge frame. Due to the fact that the steering shaft components and the sliding bridge frame are arranged, a welding machine can move on the suspension bracket, the welding range of the welding machine is effectively increased, and the problems that efficiency is low, lines are messed, contactors are loosened caused by frequent moving of the welding machine equipment during the practical operation process is solved.