The sealing structure applied on the gap of the aircraft movable surface effectively improves the stealth performance. This paper proposes a sealing plate featured with a rubber sandwich structure. The uniaxial, equal biaxial and planar tensile tests were conducted based on this structure. The fitting analysis was performed by the common constitutive models, containing Mooney-Rivlin’?s, quadratic polynomial’?s, Neo-Hookean’?s, Yeoh’?s, and Ogden’?s third order model. The hyperelastic material model was built by quadratic polynomial model and Ogden’?s third-order model. Based on the above analysis, the finite element model of the sealed plate structure was established, and the corresponding assembly analysis and aerodynamic load analysis were performed. The accuracy of the hyperelastic constitutive model of the rubber material and the simulation analysis method for the proposed sealed plate was verified by experiments.