Based on the thermo mechanical phenomenon in friction welding process, a thermo mechanical coupling model is established to simulate the temperature distribution during ceramic/metal friction welding. The proposed model could predict the temperature distribution in the process of metal ceramic friction welding with time increment. The friction heat generated in the welding interface area was consumed the aluminum in the middle layer and established the welding layer between alumina and low carbon steel. Because of the different temperature properties of alumina and low carbon steel, more thermal stress would be produced at the interface. Numerical simulation is used to predict the change of residual stress at interface between alumina and low carbon steel, to avoid incomplete interlocking and poor strength of joints during dissimilar metal friction welding.