Steel door machining welding machine

The utility model discloses a welding machine for machining a steel door. The welding machine comprises a workbench, a clamping mechanism and a transverse adjusting mechanism. A welding groove is formed in the middle of the upper end of the workbench, and a support is arranged in the middle of the upper surface of the workbench; the clamping mechanisms are arranged on the inner walls of the left side and the right side of the welding groove correspondingly; the transverse adjusting mechanism is arranged at the upper end of the support, a telescopic column is arranged at the lower end of the transverse adjusting mechanism, a mounting base is arranged at the telescopic end of the telescopic column, a welding air cylinder is arranged at the front end of the upper surface of the mounting base, a welding gun is arranged at the front end of the lower surface of the mounting base, and the welding air cylinder and the welding gun are installed in a matched mode; the steel door machining welding machine further compri