Wide bandwidth,high dimension chaotic carriers can be generated by lasers. It is hopeful to establish chaotic optical secure communication channel. Combined with the research both at home and abroad,the security performance of chaotic optical communication is demonstrated according to the cryptanalysis. The research progress in security analysis of chaotic optical communication is introduced. The advantages and disadvantages of several currently reported methods of enhancing the security of chaotic optical communication are analyzed in detail. Meanwhile,some other spare measures are proposed.