In order to meet the needs of the leap-forward development of the locomotive and rolling stock industry, the domestic railway passenger car and urban rail vehicle manufacturing industry is also actively carrying out comprehensive technical equipment transformation and product technical upgrades. The application of laser processing technology in urban rail vehicle manufacturing, including welding and cutting , Surface modification, marking, rapid prototyping, drilling and micro processing of key parts and components. Laser processing technology is the most important manufacturing technology method in the locomotive manufacturing industry in recent years, and it has greatly promoted the improvement of the level of locomotive manufacturing technology.