The princíple of the airborne nacelle jammer used for the test of the new type surface-to-air missile weapon system is summarized. The performance of the airborne nacelle jammer that is designed on the basis of the target of tactical and technique is up to the target designed. On the one hand.it is used to evaluate and identify the anti-interference of weapon system ;on the other hand.a valuable basis is provided for anti-interference training in the future.