The invention discloses a steel pipe cutting robot, which comprises a shell with external teeth and a square slot A, a slide plate inside the square slot A, a square slot B on the slide plate, and a rack inside the square slot B , there is a motor A and a connecting block on the slide, a gear A on the motor A, a boss on the shell, a baffle A, a baffle B and a motor B on the boss, a screw on the baffle A, and a screw on the screw. There are nuts, a blade under the rack, a top plate inside the housing, a pressure sensor on the top plate, a rubber pad on the top plate, a vertical rod A in the housing, a guide wheel on the vertical rod A, an opening under the housing, and a ring-shaped concave There is a bracket on the groove, a pad on the base, a PLC controller, a support rod A, a motor D and multiple vertical rods B, a gear B on the motor C, a sleeve on the support rod A, and a support rod B inside the sleeve And the spring, the motor D is connected with the rotating shaft belt, and there is glass on the casing. The invention is easy to operate, automatic feeding, suitable for steel pipes with different thicknesses, and reduces potential safety hazards.