The invention discloses a cutting device for steel foot rod machining, and belongs to the technical field of flame welding and cutting machining.The cutting device comprises two supporting frames, a supporting plate is fixedly connected between the two supporting frames, a flame cutting machine body is fixedly installed at the top of the supporting plate, and a lifting air cylinder is fixedly installed at the top of the supporting plate; the bottom end of a telescopic part of the lifting air cylinder is slidably connected into a through hole formed in the top of the supporting plate. According to the device, a transmission block moves downwards to drive an adjusting sliding rod to slide downwards, the adjusting sliding rod slides to pull a bottom limiting seat to move downwards, the limiting seat moves to drive extrusion wheels on the two sides to make contact with the surface of a cut raw material for limiting, and the relative distance between the extrusion wheels on the two sides is controlled through pulling limiting of an adjusting air cylinder; cutting limiting of raw materials of different sizes is met, rotation of the raw materials in the extrusion wheel is guaranteed through limiting of the extrusion wheel, surrounding cutting treatment of the raw materials is met, the limiting stability and the rotating capacity are improved, and the use requirement of cutting machining is met.