Through the analysis of the survival probability of a missile launch vehicle, a fact that it is difficult for a missile launch vehicle to counter the infrared imaging guided missile only by means of avoiding action and reinforced armor is clarified. A method to combine infrared camouflage net with infrared smoke is put forward, analyzed and evaluated. It has been verified that this method can greatly increase the survival probability of missile launch vehicles and is also helpful for other similar targets to counter infrared imaging guided weapons.