Abstract: The phased-array radar is characterized by high integration,big mass and the large-area antenna.Its mobility design is the difficult problem of the radar engineering. Design of a large-area antenna vehicle system is introduced in this paper, such as reasonable division and proper folding of the antenna array, the design of the automatic erecting and dismantling system of electro-hydraulic integration including the antenna deployment/folding and automatically leveling mechanism. Simulation and optimization design are carried out by MSC·ADAMS. The test result shows that the mobility of the radar meets the requirement and the designed system has the advantages of high reliability and superior performance. This design can be used as a reference for the mobility design of the similar radar vehicle.