Abstract: In order to solve the problems of long heating time, high energy consumption and slow response of traditional electric heating conveyor belt joint vulcanizing machine, this paper applied electromagnetic induction heating technology. First of all, it established the electromagnetic-thermal coupling model of the electromagnetic induction heating device, analyzed the frequency and intensity of excitation current on the distribution law of eddy current field in the Maxwell heating plate, and explored the influence of adding magnetic guide on the electromagnetic induction heating power. Based on the electromagnetic induction simulation results, the Transient Thermal module was used to obtain the temperature rise curve and temperature field distribution, so as tot determine the optimal parameters of excitation current frequency and intensity. Finally, the electromagnetic induction heating experiment bench was built to conduct heating tests under the optimal parameters, thus verifying the accuracy of the simulation results. The results show that the heating power of the heating plate can be increased by adding the current frequency and intensity, along with 29.9% by expanding magnetic guide. Under the optimal excitation current frequency of 25 kHz and strength of 29 A, the heating plate rises from 28℃ to 145℃ after 238 s, and the average temperature difference is 8℃, which reduces the heating time of vulcanization. This paper also provides a theoretical basis for the application of induction heating technology in the conveyor belt joint vulcanizing machine.