The utility model provides a special welding set of open -air electric power, relates to the power equipment assistive technology field, comprises box, pipe and welding set, is equipped with on facing the wall and meditating on the box and holds the groove, is equipped with on the lateral wall of box and puts the thing groove, is equipped with the baffle on putting the thing groove, and the side of box is equipped with the opening, is connected with the pipe on the opening of box, and the junction of pipe and box is equipped with the control valve, is equipped with welding set on the pipe, welding set comprises control lever, heat insulation and soldered connection, and the one end of control lever is connected on the pipe, and the other end of control lever is connected with the heat insulation, is connected with the soldered connection on the heat insulation, is equipped with handle and regulating switch on the control lever respectively, and box, pipe, control lever, heat insulation and soldered connection feed through each other, face the wall and meditate on the box to be equipped with the input port, the utility model discloses simple structure can portably carry welding set, effectively avoids simultaneously because of lacking the situation that high voltage power supply can't carry out weldment work, and simple and convenient efficient has improved work efficiency simultaneously.