Abstract: In order to enhance detectors- sensitivity and efficiency in UV communication system, an optical antenna was designed to strengthen the ability of collecting weak light signal in atmosphere. Based on the practical engineering background of UV optical communication system, a compound parabolic concentrator (CPC) for optical detection was optimized using rotation, translation, cutting of top and cutting of bottom respectively. Calculation, simulation and emulation of CPC were conducted. The parameters, such as maximum incident angle, flux efficiency and relationship between incident angle and the collection rate in different optimized methods for the compound parabolic concentrator for light detection were calculated and analyzed. Then different engineering conditions where different optimized methods worked were deduced. Namely, the negative direct rotation method can be used for line of sight distance communication. Cutting of bottom method can be served for the non-line-of-sight scattering short-range communications, and cutting of top CPC can be used to replace the standard one to save material cost.