The invention discloses a steel pipe placing and cutting device, and belongs to the field of mechanical machining equipment. The steel pipe placing and cutting device comprises a fixed support, pipe bearing wheels, a horizontal moving support, a horizontal moving plate, a rotating plate, a pipe pressing wheel and a cutting machine head. One side above the fixed support is vertically and rotatably connected with a plurality of sets of pipe bearing wheels in the horizontal direction, two horizontal moving guide rods are horizontally arranged on the horizontal moving support, and the horizontal moving plate can horizontally move along the horizontal moving guide rods; the middle portion of the lower side of the rotating plate is hinged to the upper side of the horizontal moving plate; a cutting hydraulic cylinder is arranged between one end of the rotating plate and the horizontal moving plate, the pipe pressing wheel is horizontally and rotatably connected to the lower side of the other end of the rotating plate, a pipe rotating motor is in transmission connection with the pipe pressing wheel, and an adjusting lead screw is horizontally and rotatably connected to one end of the rotating plate; and the cutting machine head is arranged at one end of the adjusting lead screw, and a gas guide pipe communicates with the upper end of the cutting machine head. The steel pipe placing and cutting device is reasonable in structural design, steel pipes of multiple size specifications can be rapidly and efficiently cut according to needs, and the requirement of production use is met.