In most numerical simulators, chemical reaction equilibrium equation and reaction kinetics are used to describe the gelation and degradation of the gel. The reaction kinetic parameters of different systems are quite different. High temperature cross-linked polymer gel has the characteristics of temperature resistance, salt resistance, and wide adjustment range of gel forming strength and time. Based on its characteristics and the principle of viscosity method, static experiment on the influencing of polymer and cross-linker concentration on high temperature crosslinking polymer gel gelation and degradation was carried out respectively. Then, kinetic constant and reaction order to characterize the gelation and degradation of high temperature cross-linked polymer gel system were calculated with method of linear regression. The results show that the kinetic constant and reaction order can accurately reflect the gelation and degradation of gel, which can be applied to the field numerical simulation of gel treatment.