Abstract: Base on the finite element analysis method, the coefficient of heat partition is worked out by the inverse way with the combination of infrared thermometry, finite simulation of the temperature field and verification of thermoelectric couple. The effects on the coefficient of heat partition by different friction pair materials, surface contact status and condition of heat emission are analyzed. The analysis shows that the inverse method on heat flow provides a feasible scheme for the calculation of the coefficient of heat partition, when the friction pair has properties of reducing friction and anti-sticking, the friction pair runs stably and the its dynamic coefficient changes with time smoothly. The friction surface contact and radiation condition in heat flow have significant impact on the distribution coefficient of heat emission, and the theoretical formula can be revised with the modification factor proposed in this paper.