Abstract: The electro-optical searching and tracking system is a kind of kernel electro-optical device for battlefield situation awareness, information acquisition, target capture as well as tracking and positioning, and its tracking accuracy is the key parameter to represent the combat capability of the system. According to the measurement requirements of this parameter, a design scheme of collimator array target simulator based on OLED was proposed. The simulated angular velocity range of dynamic target is 1°/s~100°/s, and the angle positioning accuracy is 0.8″. Through the analysis of angular velocity simulation of dynamic target simulator, the relative expanded uncertainty can reach 0.6%~0.8%.