在国际技术许可交易中,专利权所有人往往会利用知识产权保护制度对被许可方施加各种限制。哪些限制性做法是合理的,哪些是不合理的,各国法律和国际法对此并不完全统一。本文在研究和比较美国、欧盟、日本、中国和国际法的相应法律及其演变的基础上,指出了对我国立法的一些启示。 In international technology licensing transactions, patent owners often use the intellectual property protection system to impose various restrictions on licensees. What restrictive practices are reasonable and what are unreasonable, the laws of this country and international law are not completely unified. On the basis of studying and comparing the corresponding laws of the United States, EU, Japan, China and international law and their evolution, this article points out some enlightenments to our country’s legislation.