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In this research, the friction pair interface of spiral groove mechanical seal is used as the study object. Based on the thermal-solid coupling theory, firstly the heat fluid is simulated by using CFD to the get temperature field, and the results show that the main source of heat is the surface friction of fluid and sealing ring; Then the temperature field is imported to the sealing ring as a boundary condition for coupling deformation analysis, the results show that the deformation of the sealing ring is relatively large with respect to the film thickness; then the laws of the relationship between the rotation, the different pressure, the viscosity of fluid and the maximum deformation of the sealing ring are further studied. The results provide a useful reference for the sealing performance optimization.