Auxiliary clamp for steel structure welding

The invention discloses a steel structure welding auxiliary clamp, which belongs to the technical field of steel structure welding, and comprises a protective sleeve, and a positioning mechanism is arranged in the protective sleeve. The positioning mechanism comprises a clamping assembly used for fixing the workpiece, a supporting assembly used for supporting the clamping assembly and adjusting the height of the clamping assembly, a driving assembly used for being matched with the supporting assembly to drive the clamping assembly to transversely reciprocate, and a cleaning assembly used for being matched with the clamping assembly to clean and cool the workpiece. The clamping assemblies are arranged at the two ends of the supporting assembly, and the cleaning assembly is arranged at one end of the supporting assembly. According to the auxiliary clamp, the multiple structures are matched with one another, rapid cleaning and multiple cooling of a workpiece are achieved, so that a user can conveniently conduct