The kinetic for two-component silicon rubber formed by addition reaction was studied by the rheo-logical method. The influence of reaction temperature on reaction rate was also explored. The Oscillatory fre-quency has no influence on the study for the cross-linking process of two-component silicon rubber with rheo-logical method. As the addition reaction going on, the cross-linking degree becomes bigger and the properties of system change from liquid properties dominate to solid properties dominate. With reaction temperature in-creasing, the cross-linking rate of silicon rubber quickens and less time is needed to finish the cross-linking reaction. Based on the relation between cross-linking velocity and the reaction temperature, the apparent acti-vation energy of system can be obtained. Rheological method is suitable for studying the silicon rubber cross-linking process.