遗传算法的函数优化实例，并就遗传算法在解决连续函数优化问题中存在的不足之处，提出了一种新的编码方法——浮点数编码方法，最后，通过实例验证了该方法的可行性和有效性。(A function optimization example of genetic algorithm,after analyzing the problems existed in the current model coding methods for plastic injector, this paper puts forward a new method facing its application functions.)