A projectile spotlight is designed based on the light emitting diode(LED) source with a high power and a high optical density. Based on the non-imaging optical theory and by using the ZEMAX software, a collimating optical system with the large-aperture and high-transmissivity Fresnel lens as the core element is established. A cylindrical Fresnel lens with a focal length of 1500 mm is used for the diffusion of the collimated beam along one-dimensional direction and then the spotlight is irradiated at the target surface with a tilt angle of 6.85° and finally a large area illumination is realized. The simulation analysis by the TracePro software shows that the divergence angles of light spot in the horizontal and vertical directions are 18.1°and 2.46°, respectively. A clear and high contrast oval-like shaped bright spot is obtained when the prototype is projecting on the aiming target, and the maximum illuminance at its center is over 110 lx, which meets the requirement of the night shooting for fighters.