The numerical simulation of structure characteristic of the cruise missile was performed. The cruise missile was equipped with grid fins and three fan folding wings. The structure model was made by the software Patran, all parts of the structure's material property were input, and then the intrinsic mode was calculated by the software Nastran. The intensity of the cruise missile's folding wing was checked based on the aerodynamic data, the static calculation was made by the software of Nastran, and the largest attack angle under various Mach numbers was obtained.