Abstract: The parameters of the strain-energy model, namely Mooney-Rivlin model, which is suitable for a small deformation rubber, was determined by the virtual work equation of strains and stresses. The 3D model of the rubber fastener was established and the displacement and stress distributions were simulated by the finite element software of Abaqus. The force and displacement curve was also obtained and the simulation results were verified by the experiments. The results show that the stress distribution of the rubber fastener simulated with the determined parameters C10 and C01 coincided well with the real stress state. The maximum compressive displacement was about 3 mm. The simulated force-displacement curve was in accordance with that by experiment. The Mooney-Rivlin model can be used to analyze the deformation of the rubber fastener.