预防原则是国际环境法的主要原则和国际环境政策的核心所在。它起源于国内环境法，在国际法上的演进也从海洋环境领域发展到其他领域。它被数十项多边环境条约所采纳且为其中重要的原则，不仅对成员方有拘束力，而且采取预防原则的国家实践是划一的，笔者认为预防原则已经成为国际习惯法的一项原则。 The principle of prevention is the central principle of international environmental law and the heart of international environmental policy. It originated in domestic environmental law and its evolution in international law has also evolved from the marine environment to other fields. It is adopted by dozens of multilateral environmental treaties and is one of the most important principles. It is not only binding on the member sides, but also adopts the same national practice as the precautionary principle. I think the precautionary principle has become a principle of customary international law.