实现相同产品功能，可用不同的产品设计方法，因而体现在产品的功能特性、开发周期及其它经济性指标上亦不相同。该文建立了评价产品设计方法的指标体系，并基于模糊理论建立了评价模型，通过对某企业摩托发动机产品开发的具体评价说明了该方法的应用过程。实际应用证明，该方法可靠易行 Achieve the same product features, different product design methods can be used, and therefore reflected in the product features, development cycles and other economic indicators are not the same. This paper establishes an index system to evaluate the product design method and establishes an evaluation model based on fuzzy theory. The application process of this method is illustrated through a specific evaluation of the development of a motorcycle engine product. Practical application shows that the method is reliable and easy to implement