Abstract: Aiming at the urgent need of the development of infrared stealth technology and anti-stealth technology, a simulation model of infrared image of stealth aircraft was established, and the effect of infrared stealth of stealth aircraft was quantitatively evaluated. Firstly, the infrared stealth modeling was accomplished for the two-dimensional exhaust, low emissivity skin, engine room insulation and cold air injection based on the infrared radiation calculation model of the aircraft, and the infrared image of the stealth aircraft was generated through rendering. Then the stealth effect of three infrared stealth measures including low emissivity skin, engine room insulation and cold air injection were analyzed. The simulation results show that the stealth fighter radiation varies greatly under different stealth measures.