Welding clamping device for steel structure

The utility model discloses a welding clamping device of a steel structure, which belongs to the technical field of steel structure processing, and comprises a workbench and two C-shaped support plates arranged above the workbench, two linear motors are embedded in the top end of the workbench, moving parts of the linear motors are connected with a scale circular plate, the top end of the scale circular plate is welded with a limiting pipe, and the limiting pipe is connected with the workbench. The scale circular plate is rotationally connected with a supporting rod through a bearing, an L-shaped assembling plate is arranged on the outer side of the supporting plate, and the supporting rod is fixedly connected with the assembling plate. A threaded hole is formed in the side face of the limiting pipe and is in threaded connection with an abutting threaded rod, the abutting threaded rod is rotationally connected with an arc-shaped plate used for fixing the supporting rod through a bearing, the assembling plate