With the development of the fourth-generation IR imaging air-to-air missile,the requirement of seeker for image simulation is increased gradually in the process of guidance hardware-in-the-loop simulation.On the basis of existing research on infrared scene simulation modeling technology of variable tracking point based on seeker optical axis pointing,in the paper by the IR scene simulation modeling of variable center point,the time error introduced in the distributed guidance hardware-in-the-loop simulation system is analyzed.After fully considering the possible values and noise conditions of various parameters that may introduce time errors,quantitative time delay results are given,and the contribution of various parameters to time delay is analyzed,which provides data and theoretical basis for the engineering application of variable tracking point infrared scene simulation technology.