近年来，一些国家常常利用各种做法对进口或外来投资设置各种壁垒措施，已经成为制约我国出口和对外投资发展的主要因素之一。20世纪70年代以来，美国和欧共体等发达经济体先后制定了贸易壁垒调查程序规则，并依此建立起了较完善的贸易壁垒调查制度，在实践中较为有效地维护了 In recent years, some countries have used various practices to set various barriers to imports or foreign investment, which has become one of the major factors that restrict China’s exports and the development of foreign investment. Since the 1970s, advanced economies such as the United States and the European Community have successively established rules for the investigation of trade barriers and established a relatively complete system of trade barrier investigations, which has been effectively maintained in practice.