美国“法庭之友”制度是美国诉讼程序中的一项重要制度 ,本文在对此制度进行相关介绍的基础上 ,阐明了外国作为“法庭之友”参与美国法院诉论程序的由来、规则与实践 ,同时也论述了美国联邦政府作为“法庭之友”的规则和特殊性。 The system of “friends of forensic court” in the United States is an important system in the U.S. litigation process. Based on the introduction of the system, this article expounds the origin, rules and rules of foreign countries as “friends of forensics” participating in the court proceedings in the United States Practice, but also discusses the rules and particularities of the U.S. federal government as a “friend of the court.”