Aiming at the method for infrared suppression of the high temperature object, the heat pipe with the high thermal conductivity is studied. The technology characteristics of heat pipe are analyzed theoretically, and the thermal conductivity model of heat pipe module is established. The performance of the infrared suppression of the heat pipes with different power is calculated systematically. The experimental model of the theory of the heat pipe module is established, and the infrared suppression effect of heat pipe is tested. The results show that the radiation temperature of the object is reduced from 140 ℃ to 65 ℃ when the heat pipe is used.