Abstract: A vibration isolation system with metal rubbers as its dampers is studied in this paper. The metal rubber is a kind of compressible super elastic materials and can not be accurately represented by the classic rubber constitutive model. To estimate the performances of the vibration isolation system, the Ogden constitutive model in the ADINA program is modified to simulate the properties of metal rubber. A nonlinear analysis program is used to calculate the harmonic frequency of the system and related tests are carried out. It is shown that the error of the calculated frequency is 2.1% and the error of the calculated acceleration is 18.2%. This method may provide some reference for the design of vibration isolation system with metal rubber dampers.