Welding wire feeding device

The utility model relates to a welding wire feeding device which comprises a mounting plate, two vertical plates are mounted on the upper side of the mounting plate, a material disc is mounted between the two vertical plates, a welding wire is wound on the material disc, a support is mounted on the outer side of the mounting plate, a U-shaped plate is arranged on the upper side of the support, and a driving roller is rotationally mounted between the inner walls of the two sides of the U-shaped plate. A motor is installed on the surface of one side of the U-shaped plate, an output shaft of the motor is connected with the driving roller, two side plates are arranged on the upper side of the U-shaped plate, and a driven roller is rotationally installed between the opposite faces of the two side plates. By means of the arrangement of the guide grooves, welding wires of different diameters can be positioned, the position of the U-shaped plate can be adjusted in cooperation with the arrangement of the adjusting dev