Abstract: A high frequency airborne antenna is expatiated as an example to introduce the features and key technology of high precision antenna structural design. Antenna system composition and equipment integration method is introduced. The detachable integrated column module, Structural & thermal design of the antenna framework, and hermetical design of the antenna^,s equipment are described in detail especially. The rationality of the structural design has been proved by the FEA, and the stiffness and strength can meet the design requirements.