介绍了实值优化问题的进化算法，自然进化是基于群体的优化过程，在计算机上模拟自然进化过程形成统计优化技术．同传统优化方法相比，进化算法具有全局优化的优点，而且适合复杂的实际问题．带宽优化是寻找结点编号的最佳排列，使得刚度矩阵的带宽最小．传统方法一般求得带宽的局部极小值，而带宽优化进化算法可求得带宽的全局最优解 The evolutionary algorithm of the real-valued optimization problem is introduced. Natural evolution is based on the optimization process of the population. The natural evolutionary process is simulated on the computer to form the statistical optimization technique. Compared with the traditional optimization methods, the evolutionary algorithm has the advantages of global optimization, and suitable for complex practical problems. Bandwidth optimization is the search for the best arrangement of node numbers, minimizing the stiffness matrix. The traditional method generally obtains the local minima of the bandwidth, and the bandwidth optimization evolutionary algorithm can obtain the global optimal solution of the bandwidth