Along with the development of fiber laser source , hand-held laser welding machine was widely used and changed the industrial welding market by making it much simple for different angle and welding processing like tailored welding ,overlap welding ,T-profile welding ，Internal/external corner welding and wire feefer .it could completely replace the application of traditional arc welder and electric welder technology in thin stainless steel ,iron sheet, aluminum plate and other metal sheet.