Welding robot for bus of aluminum electrolysis cell

The utility model relates to the technical field of aluminum electrolysis cell bus repairing, and provides an aluminum electrolysis cell bus welding robot which comprises a controller, two first rails, a second rail, a third rail, two first driving transmission devices, a second driving transmission device, a third driving transmission device, a fixing base and a welding tool. The two first rails are parallel, the first and second rails are horizontal, the second rail is vertically and slidably arranged at the tops of the two first rails, the third rail is vertically and slidably arranged on the front side of the second rail, the fixed seat is slidably arranged on the front side of the third rail, and the welding tool is arranged on the fixed seat; the two first driving transmission devices are connected with the two ends of the second rail respectively, the second driving transmission device is connected with the third rail, the third driving transmission device is connected with the fixing base, and the con