Wet friction pair is used in the wet clutch,hydroviscous drive and wet brake,is the key part of the transmission system.The thermalsolid coupling process of wet friction pair is affected by many factors,including pressure,relative rotation speed,lubrication flow.The finite element method and experimental study were used to analyze the spatial and temporal distribution characteristics of temperature field of wet friction interface,based on the theoretical analysis.The temperature field variation of wet friction interface during sliding process was studied based on the change rules of the press,relative rotation speed and lubrication flow.It is shown that the high temperature zone is also the high stress zone,which is distributed along the radius direction of the annular surface.The highest temperature is increased with the press and relative rotation speed increasing,and the lubrication flow decreasing which is verified by the test results.