A device for treating the free edges of ship member is designed. Through the special supporting software, it is quick and easy to convert the member model into the execution program that can drive the device. The device automatically completes the member fixing, spatial positioning, cutting tool inspection, member free edge double-sided treating and other actions, which can realize the automatic machine operation in the free edge treating procedure of ship member, improve the production efficiency, and improve the automation degree in the shipbuilding industry.