The pipeline numerical control intersecting line cutting machine uses the digital program to drive the movement of the machine tool. With the movement of the machine tool, the cutting tool with the cutting tool is used to cut the pipe. At present, it is widely used in CNC flame cutting machine and CNC plasma cutting machine. Flame cutting applications are mainly limited to carbon steel, large thickness plate cutting, in the medium and thin carbon steel plate cutting will gradually be replaced by plasma cutting. The fine plasma cutting has been made close to laser cutting quality level, now with high power plasma cutting technology, cutting thickness has more than 100mm, broaden the scope of intersecting line cutting CNC plasma cutting machine.