在界定法的定义的过程中实质上是对法的特征的解读。从法的作用对法进行宏观解释,从法的运行对法作微观论证,结合法的本体论把法定义为第一性规则和第二性规则的结合,本篇文章通过设证推理的方式对法进行了合理的分类式的解读,笔者结合自身对法理学的认识更进一步的对法的本体论有了新的认识。 In defining the definition of law, it is essentially an interpretation of the features of law. From the function of law, we can make a macroscopic interpretation of the law, from the operation of the law to the micro demonstration of the law, combining the ontology of law to define the law as the combination of the first rule and the second rule. A reasonable classification of the law was interpreted, the author combined his own understanding of jurisprudence further on the law of the ontology has a new understanding.