Abstract: The space targets are susceptible to jitter by space junk collision and interference. Aiming at the problem of model construction of infrared images of space targets in jitter state, the main noise of space-based infrared imaging system was analyzed, and the effect of stray light was considered. Based on the combination of Creator and Vega software platform, a modeling method of infrared images of space targets with surface defects in jitter state was proposed. The infrared radiation characteristics of space targets were analyzed according to their basic characteristics, and the 3D modeling of space target defects was carried out in Creator. The temperature field of the 3D model was analyzed according to the infrared radiation characteristics of the target and background, and the infrared image model was obtained by combining the analysis results with Vega infrared module. The mathematical model of jitter image was determined and the jitter effect was applied to the simulation image, and then the stray light effect was applied to obtain the final simulation image. The experimental results show that the infrared images of space targets in jitter state generated by this method are highly similar to the experimental images, which can provide an effective simulation system for space target detection and situation awareness.