A Compound Parabolic Concentrator (CPC) is designed based on the principle of non-imaging optics to develop a novel Photomultiplier Tube (PMT).An efficient solution is proposed for the optimization design of CPC electron-optical parameters based on the Genetic Algorithm (GA).GA simulating the evolutionary mechanism of nature is a global optimization parallel searching method.The photoelectron collecting rate of anode is used as the fitness function of GA and the structure and electrical parameters as the optimization searching variables.By controlling the GA inheritance evolution direction,global optimization of CPC electron-optical system is realized.Simulation experimental results show that the optimized CPC is able to focus light and photoelectrons efficiently.As an example,for light incident angle of 30°,corresponding light transmission rate of above 75% and the photoelectron collecting rate of almost 100% are able to achieved respectively with the CPC.Such a design can be applied to develop the PMT of large detection area,and reflective photocathode for photon detection.