The traditional star points position error testing method cannot be applied to infrared star simulators. To address this issue, a new method for star points position analysis, simulation and test of infrared star simulators is proposed. Combined with the traditional star points position testing method of star simulator, the influence of aberration on star points position simulators is analyzed. The theoretical model of aberration and star points position simulation is formulated. Through error fitting the theoretical relationship that good image quality represents small single star points position error is analyzed. According to the docking mode of star simulator and star sensor, a visible and infrared light dual configuration collimating optical system with large exit pupil distance and an external position is designed, which could make the image quality of infrared band better than that of visible band. The accuracy of the theoretical model is evaluated by theodolite measurement. The actual measurement results show that the single star position error in visible band is better than ±13. 65″. It indirectly realizes the single star position error in infrared band better than ±13. 65″