Abstract: Under the combined action of the compression force of the pressing mechanism and the accelerating load at the launch stage, the stress on the solar panel cell of the flexible foldable solar wing under the folded and compressed state should meet the mechanical strength requirements. In this paper, the finite element method (FEM) was used to calculate and analyze the main factors affecting the stress on the cell, including the layout and thickness of polyimide foam, the mechanical properties of polyimide foam, the structure of cover plate, and the shape of embedded parts. This paper summarized the main sources of reducing the compressive stress of the cell near the compression point of the flexible solar wing under the folded and compressed state, and provided design and analysis ideas for the engineering development of the flexible foldable solar wing.