Building steel structure cutting equipment

The invention discloses building steel structure cutting equipment which comprises a fixing base, a first air cylinder, a feeding plate, a supporting plate, a motor, a third air cylinder and a limiting assembly. The limiting assembly is composed of an installation base, a hinge piece, a rotating piece and a limiting piece, the limiting piece is arranged in the installation base, an adjusting disc and a spring are arranged on the limiting piece, the hinge piece is installed on the installation base, the rotating piece is installed on the hinge piece in a hinged mode, one end of the limiting piece extends into the cutting area, and a strip-shaped groove for containing the rotating piece is formed in the supporting plate. The building steel structure cutting equipment is compact in structure and ingenious in design. And the steel structure square tube which is being cut in the front can be cut through the moving force and gravity of the steel structure square tube. And external electric power or source assistanc