The invention relates to an automatic
welding working platform of a steel structure. The platform comprises a platform bottom frame base and a
pulley rail arranged on the platform bottom frame base, wherein supporting mechanisms, a
welding machine and a tool operating platform are arranged on the
pulley rail, and a rotary indexing mechanism and a control panel are arranged at the left end of the platform bottom frame base. The supporting mechanisms comprise a first supporting mechanism and a second supporting mechanism, the first supporting mechanism, the second supporting mechanism, the
welding machine and the tool operating platform are all provided with foot pulleys matched with the
pulley rail, the control panel controls vertical lifting of the rotary indexing mechanism and the supporting mechanism and the horizontal movement of the supporting mechanism, and the welding
machine is provided with an existing pneumatic type automatic welding
system. According to the platform, the rotary indexing mechanism is provided with an annular graduated scale for measuring the rotation angle of a workpiece A, the two ends of the workpiece A are supported by the supporting mechanism and the left end of the workpiece A is fixed on a circular rotary disc of the rotary indexing mechanism, then the welding machine is used for carrying out automatic
machining and welding, so that the automaticoperation is realized, the labor cost is reduced, and the requirements of an existing market are met.