Abstract: In this article, modularization idea is used for the system structure design of a vehicle-borne high-mobility radar. Printed circuit technology is exploited for antenna interconnection study. Antenna, T/ R module, power module are connected together using blind-mate connectors, saving lots of cables. To solve the heat dissipation problems of antenna devices, the air channel structure of the distributed air-cooling system and the framework of the high-frequency cabinet are integrated together, filtration devices are also installed to prevent the erosion caused by dust, rain, salt fog, etc.