软法是指那些不具有法律约束力、但对主体行为有指导和规范效果、人为设计的国际规范。相对于条约,软法具有成本低、批准快、修订易、弹性大等优势。条约是软法的重要归宿,特定情况下,软法可以被国际组织或国家采纳,成为条约的一部分。通过对软法和条约关系的研究,我们看到未来软法必将获得更大的发展空间,软法与条约并存发展是国际规则领域的长期特征。 Soft law refers to those not legally binding, but the guidance and normative effect of the main behavior, artificial design of international norms. Compared with the treaty, soft law has the advantages of low cost, quick ratification, easy revision, flexibility and so on. Treaties are an important end to soft law. Under certain circumstances, soft law can be adopted by international organizations or countries as part of the treaty. Through the study of the relationship between soft law and treaty, we can see that soft law will gain more space for development in the future. The coexistence of soft law and treaty is a long-term feature in the field of international law.