Abstract: The conventional thermal-vibration coupling method lacks the consideration for the changes in the thermal characteristics of materials, which affects the accuracy of simulation analysis. Therefore, in this paper, an analysis method by dynamic coupling of thermal characteristics and vibration was proposed, and a dynamic thermal-vibration coupling equation was established. Based on the flash transient method, the thermal characteristic parameters of materials were obtained and applied in the numerical simulation of structural heat transfer process. The results show that whether or not the variation of heat transfer characteristics of materials is considered exhibits a great impact on the heat transfer process simulation results of the structure, which will further affect the simulation results of the stiffness characteristics of the structure, resulting in errors in structural modal analysis. The accuracy and reliability of heat transfer simulation analysis can be improved by the proposed dynamic thermal-vibration coupling simulation method.