Abstract: Based on boundary layer theory and radiated noise theory from boundary layer transition,the monopole sound source model of Liepmann analogy on displacement thickness is improved by using Krane dipole sound source model.The basic theory and method of genetic algorithms are investigated,based on the investigation,the optimization problem of flow-noise combined with genetic algorithms is discussed,and a complete optimization method and models are established for the flow-noise optimization design of the body of revolution.The results show that the overall optimal solution is found,and the greatest noise reduction attains 11.8%.