Dynamic visible light target simulator with specific field is a key device for the testing and evaluation of the visible light imaging system, and the collimated projection optical system of this simulator determines the performance of the dynamic scene projector based on Digital Micromirror Device (DMD). According to the imaging system test and evaluation requirements, the visible light collimated projector optical system is designed here. After the parameter calculation of optical projection system, a 58° large-field optical system of visible target simulator is designed according to the requirement of imaging system. The matched simulation is done between the design results with the imaging optical system, and the matched result is good. Experimental results show that the designed optical system meets the requirements of simulator and dynamic scene simulation completely.