The analysis on all thermal resistances in a sort of chip radiator with heat pipe is made through the method of electro-thermal simulation.The electric heat transfer model is established of the heat pipe chip radiator under forced air cooled condition, and the formula of its total heat-transfer ability is worked out. Then, a certain kind of designed instance is simulated by ICEPAK software,and the simulated result corresponds to the theoretical computational result basically,and so the validity of the electric heat transfer model is verified.