Generally,the system equipment of port has a large size and great mass,and crane rails with a large cross-sectional area are often used as walking rails.According to the characteristics of the port system equipment and the conditions of the project construction site,combining with the structure of the dock and yard,and with reference of the seamless connection technology of the light rail,we analyze the material composition of the rail and the internal organization changes in the welding process,and recommend a connection method and process to ensure the safety of equipment use and the comfort of operators,stable connection,easy maintenance,simple operation and satisfy the requirements of the rail installation site of port system equipment,which is conducive to achieving the construction period target and can be widely popularized and applied to the rail connection of heavy locomotives or lifting equipment such as mines,ports,power plants,docks and yards.