In our country, the climate environment is changeable, the vehicle running speed is fast, the railway line mileage is long, the traffic density is large, and the traffic volume is high, which brings severe test to the safety and stability of the rail transit operation. How to ensure the safe operation of rail transit is a major issue that has received wide attention, from research and development, design, production, manufacturing, installation and commissioning to late operation and maintenance have high requirements, there are more and more "independent innovation + intelligent" new technology and new solutions have been applied to ensure the safety of rail transit. Among them, laser processing technology with its high precision, high flexibility, intelligent control, open system, information interaction network, green characteristics, not only meets the requirements of industrial policy, but also has the inherent advantages of intelligent manufacturing, can greatly promote the improvement of China's rail transit equipment manufacturing process level.