国际习惯法是国际法最重要的渊源之一,但是在当代国际法理论体系中,国际习惯法一直处于比较尴尬的地位,理论争议也非常多。为了能够把握国际习惯法的本质特征,本文从国际社会和分析实证的角度,对国际习惯法形成和效力来源的理论和实践,做了系统考察,以构筑一个比较全面、客观的国际习惯法理论体系的基础。 International customary law is one of the most important origins of international law. However, in the theoretical system of contemporary international law, customary international law has always been in a rather awkward position and its theoretical controversies are also numerous. In order to grasp the essential characteristics of customary international law, this article systematically examines the theory and practice of the origin and validity of customary international law from the perspectives of the international community and empirical analysis in order to build a more comprehensive and objective theory of international customary law The foundation of the system.