Abstract: In order to meet the new requirements of high-performance active phased array antenna, an innovative structure design scheme is proposed, which is composed of a cable-truss combination frame and a parallel drive device. First, the finite element model of this structure scheme is established. The static structure of the antenna is analyzed by applying external loads such as deadweight, temperature and wind. With the objective of optimal deadweight, a set of structure solutions is obtained by sequential linear programming method and optimizing the cable and rod section dimensions. Compared with the traditional scheme, under the premise of ensuring the front surface accuracy, the profile deformation is improved and the total weight of the back frame is reduced by about 40%.