The solar array is a crucial energy source for satellites. Considering the trend towards miniaturization and rapid maneuverability in satellite technology, solar arrays must balance stowage efficiency and stiffness. This study first conducted an analysis of the structural features of high-stiffness solar arrays. Then, based on the practical requirements of a specific satellite, an innovative solar array design was proposed. This design incorporates a multi-panel Solar Array with Struts, specifically using three struts and two springs to stabilize and reinforce the outer panel among the two solar panels, thereby significantly enhancing the stiffness of the solar array. This paper conducts a finite element analysis model of the solar array to analyze its fundamental frequency in the deployed state. Additionally, a rigid-flexible multibody dynamics simulation model was established to facilitate a comprehensive understanding of the solar array deployment process. The simulation results validate the rationality and superiority of the design. Furthermore, this paper provides a comprehensive summary of the research and presents professional recommendations for designing high-stiffness solar arrays, to offer valuable references and insights for future related studies.