Abstract: This paper presented the procedure and method of design on Airborne Millimeter-Wave radome, and gave principle andformula of Four-port microwave network and geometry optical-ray tracing method. The paper also discussed techniques of theselection of radome materials，the selection of structure of radome layers and the control of precision for manufacturing. A radomewas designed, and the tested results were coincident with request. The paper can be a reference on design of AirborneMillimeter-Wave radome.