Aiming at current situation that the installation and disassembly of antenna protection frame of radar are carried out by manual work,an automatic folding/unfolding mechanism for sectional type protection frame of radar was designed,while it could be used as maintenance function platform.Automatic folding/unfolding for protection frame was realized by the application of hydraulic closed loop synchronization control technology,and maneuvering characteristic of radar was advanced greatly.The key part mechanical characteristics was analyzed by using multi-body dynamics simulation and optimization technology.It provides reference for study and development of the mechanism.