Direct-current electric welding machine with stable chip prevention performance

The direct-current electric welding machine comprises a box body, a ventilation opening and a mounting groove are sequentially formed in the inner side wall of one side of the box body from inside to outside, the width of the mounting groove is larger than that of the ventilation opening, and a protective net is mounted in the mounting groove; a limiting assembly abutting against the surface of the side, away from the ventilation opening, of the protection net is installed on the side wall of the installation groove. According to the electric welding machine, the protective net is mounted in the mounting groove, and the limiting assembly abuts against the surface of the side, away from the ventilation opening, of the protective net, so that the stability of the protective net mounted in the mounting groove is enhanced, and the protective net keeps a good chipping prevention effect in the working process of the electric welding machine. 本申请涉及一种防屑性能稳定的直流电焊机，包括箱体，所述箱体一侧的内侧壁由内向外依次开设有通风口和安装槽，所述安装槽的宽度大于通风口的宽度，所述安装槽