The frequency response function of power saw system reflects the dynamic characteristic of the system. The design of the isolation mounting is just the right frequency response function which is to meet the requirement of isolation by means of correctly choosing the mass, rigidity and damp of the power saw system. The frequency response function can be obtained by theoretical calculations or experiments. In this paper the way to determine the frequency response function as well as its application in designing the isolation mounting of the power saw system through experiments is explained.