Abstract: This paper briefly introduces the application and development status of flexible modular cranes in China and determines the overall design scheme. According to the functional characteristics and load-bearing features of the rail profiles used in flexible modular cranes, the functional structural design and strength verification are carried out. Through theoretical design, mechanical analysis, and simulation verification, the results show that the design scheme is feasible and the rail profile structure is stable and reliable. Meanwhile, the stress, displacement, and strain distributions under rated load conditions are verified to meet safety standards. The research provides reference for high-precision and high-flexibility material handling in scenarios such as light-industry production lines and intelligent warehousing logistics.