Based on the principle of Geometrical Optics (GO), a Flyeye concentrator with uniformity irradiance distribution on the solar cell in Concentrator Photovoltaic (CPV) system is presented. This Flyeye concentrator is composed of four surfaces, that is, refractive surface, mirror surface, freeform surface, and transmission surface. The discrete points of concentrator contour are solved according to edge-ray principle, ray reversibility principle and Fermat’s principle. Finally, the solid model is constructed by using 3D software. The sun light is used to simulate the incident light by ray tracing software. Results show that the proposed Flyeye concentrator is designed well by this method with a uniformity of more than 98%, Concentration Ratio (CR) of more than 31× and average thickness of 9.9 mm.