Working method of automatic welding device for steel structure

The invention relates to the field of steel structure welding, in particular to a working method of an automatic welding device for a steel structure. The automatic welding device comprises a discharging mechanism, a first positioning mechanism, a second positioning mechanism, two feeding mechanisms and two pressing mechanisms. The first positioning mechanism includes a first mounting frame, a first rotating assembly, a first driving assembly and a plurality of first buffering assemblies. The first rotating assembly, the first driving assembly and the first buffering assemblies are all installed at the upper end of the first mounting frame. The second positioning mechanism includes a second mounting frame, a second rotating assembly, a second driving assembly, a moving assembly and a plurality of second buffering assemblies. The moving assembly is mounted at the lower end of the second mounting frame, the second rotating assembly, the second driving assembly and the second buffering assemblies are all mounted