判例在成文法国家正日益发挥着不容忽视的作用,我国学者对成文法国家判例的合理性基础也进行了多角度的研究。本文从成文法制度自身出发分析判例产生的合理性根源,认为判例是自由裁量权行使的结果和要求。 The precedent is playing an increasingly important role in the written French law. Chinese scholars also conducted a multi-angle study on the rationality of the written law jurisprudence. This article analyzes the rationality origin of the precedent from the statutory system itself, and considers that the precedent is the result and requirement of exercising discretion.