Abstract: Based on the study of statistic property of Logistic map,the nested intervals chaos search is proposed to avoid the blindness of chaos search.By combining the nested intervals chaos search with conjugate gradient approach,a hybrid optimization algorithm is given.The hybrid algorithm uses the nested intervals cha-os search to find the approximal point of the global minimum and uses conjugate gradient approach to find the global minimum.The simulation shows that the proposed hybrid optimization algorithm can significantly im-prove the computational efficiency of global optimization.