Clamp for steel structure beam machining

The utility model relates to the technical field of clamps, in particular to a clamp for steel structure beam machining, which enables a device to conveniently clamp and fix steel structure beams of different specifications, improves the use range of the device in the use process, and improves the practicability. A bottom plate is fixedly installed at the top end of the workbench, and two clamping mechanisms are fixedly installed at the top end of the workbench in parallel. The clamping mechanism comprises a limiting barrel, the limiting barrel is longitudinally and fixedly installed at the top end of the workbench, a supporting rod is slidably connected into the limiting barrel, a threaded groove is formed in the bottom end of the supporting rod, and a first screw is installed at the bottom end of the supporting rod in a threaded mode and rotationally connected with the workbench. A sliding rod is transversely and slidably installed at the end, away from the supporting rod, of the transverse rod, a clamping