The treatment principle of air interlayer heat exchange was determined based on heat transfer theory and considering heat conduction, heat convection, and heat radiation. For the thinner air interlayer, equivalent conduction was applied based on heat conduction and heat radiation; for thicker air interlayer, middle nodes was introduced based on allowing a convection surface load and heat radiation. This method can be used to treat heat exchange between air interlayer. The temperature result of simulation was accord with the measured value by experiment.