Mine scraper conveyor chain is hard to cut, and electric saw is not recommended to use for safety, so artificial saw is used at present. In order to solve the difficulty, based on traditional bow sawing machine,a new pneumatic sawing machine was put forward in which pneumatic system was adopted as power supply and the reciprocating movement and the feed of the saw were realized. Prototype test shows that the sawing machine can maximize to protect tool, cutting material is wide, performance is stable, operation and maintenance are convenient. It is a new type of cutting equipment which has a wide cutting range, safety and reliability.