The principle of rubber and soft wood antivibration system is stated simply and analyzed by its mathematics model. The methods of isolating vibration are put forward. In order to calculate the antivibration system accurately
the article lists the calculating formulas of the rigidity and inherent frequency of rubber and soft wood. These formulas have been also used to calculate the practical system. The practical rubber and soft wood antivibration system has been measured
the practical amplitude of the system is obtained. The measuring result shows that this system can be used to isolate precision instruments from vibration.