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The investigation of the temperature field of friction plate can be applied in guiding the design of materials and structure of friction plate.Owing to the friction heat generating on the surface of the actual contact,the distribution of the friction heat is asymmetry and concentrate on the local area.In the present paper,the physical model of local contact is presented firstly.Then the mathematical model of the temperature field of the actual contact area is established according to the guiding heat theory.The mathematical model consists of differential equation (Eq.1),original condition (Eq.2) and boundary conditions (Eq.3,Eq.4,Eq.5).The models are verified taking example for the Cu-based wet friction plate.The results indicate that theory values interpret the test results correctly; the maximum temperature grads exist from the surface to the hypo-surface 15 μm deep; the lubrication oil affects the temperature field markedly.The model of the temperature field is presented the theory gist for studying the wearability and heat resistibility of the friction plate.