To predict the life of the clutch friction plate, friction characteristics of the friction plate and the steel sheet assembly are analyzed in the full life cycle. A contact model of the friction surface is built based on the micro-convex body model. Wear mathematical models of friction plate are established respectively based on the contact model and sliding friction work model. The wear results of the two models are compared and analyzed. The effect of temperature on wear is considered. Fatigue life of the friction plate is predicted by wear mathematical model according to the real working states. The accuracy of the contact model and the influence of temperature on the wear are determined through the comparative analysis of each prediction result.