To reduce human effort for repetitive work of cutter pieces of pipes as well as providing a convenient fixture to support and hold the pipes during cutting. Automatic gas pipe cutting machine is lightweight, portable chain type. Gas cutting machine is an automatically operated by cutting machine that uses chain drive which works on shaft rotated by DC motor. The shaft of DC motor rings the chain drive & whole assembly is circulated over the pipe in 360 degree; whereas lead screw with spring is attached to fix the base plate with 4 wheels & upper plate. The gas cutter or torch is fixed to base plate, which will be powered by oxy-fuel cylinder & the desired section is cut as per need. This project gives an idea about portable, easy to use gas pipe cutting machine which cuts the pipe from 380mm thickness to thickness having change in chain drive.