Abstract: In order to explore the temperature and degree of vulcanization(rubber crosslinking degree)of different areas of the conveyor belt in the vulcanization process with time,this paper obtains the values of rubber thermal conductivity and specific heat capacity at different temperatures through experiments,and writes UDF program for introduction into FLUENT.The rubber vulcanization curves at three temperatures of 145℃,150℃and 155℃ are fitted and analyzed to determine the optimal vulcanization kinetic model.Based on C language and FLUENT predefined macros,the UDF user-defined program model is compiled,and the heat transfer and vulcanization degree of the conveyor belt are coupled through the finite element analysis software FLUENT,and finally the accuracy of the simulation is verified by temperature measurement experiments.The results show that the vulcanization kinetic model,the setting of initial conditions and boundary conditions,and the coupling calculation method of vulcanization and heat transfer selected in this paper can accurately predict the vulcanization process of the conveyor belt.The heating rate of the outer and inner areas of the conveyor belt is significantly different,and the central area is the area with the slowest heating rate,the longest scorching time,and the final completion of vulcanization.According to the simulation results,the vulcanization process can be optimized for the belt vulcanization time,rubber material formulation, rubber preheating,etc.