Abstract:  According to the current independent research and development and the research needs of localization of catenary anchor leg mooring device, combined with existing engineering practice experience of development projects, the overall technical scheme, the critical points of engineering and factory acceptance test requirements of the hydraulic isolation system are summarized and explained. On this basis, based on the engineering system simulation software SimulationX, the simulation analysis model of the hydraulic isolation system is built, and the dynamic characteristics analysis and computer simulation verification are carried out on the specification and design accuracy of key equipment, such as accumulator rack and umbilical size, as well as the function matching of the whole system. The research results can provide useful reference for the subsequent independent research and development and engineering application of relevant ocean engineering equipment.