Aiming at the problem of target identification for an incoming exoatmosphere ballistic missile,It is proposed a ballistic target infrared radiation detection simulation method. The infrared radiation characteristic is one of the basic characteristics of the project-type target in the atmosphere. It is also an important basis for target recognition. For the infrared radiation characteristic identification of the ballistic target,the modeling and simulation of infrared radiation characteristics of the earth-based infrared sensor are established. Firstly,the ballistic targets are classified,and the recognition principle is summarized;Then the infrared radiation of typical targets is simulated based on the STK/EOIR module;Finally,the infrared radiation characteristics of target and decoy are analyzed.