美国反垄断法的违法判定原则前后经历了“本身违法原则”和“合理原则”。而今,美国法院不再严格区分两者,而是同时考虑这两个原则。本文简要介绍和分析了“本身违法原则”和“合理原则”的产生过程、优势和缺陷,进而得出其对中国反垄断立法和司法的启示。 The principle of the law-breaking of the antitrust law of the United States has experienced “principle of own violation” and “principle of reasonableness” before and after. Today, however, the U.S. courts no longer strictly distinguish the two, but consider both these principles. This article briefly introduces and analyzes the generation process, advantages and disadvantages of “the principle of per se illegality” and “the principle of perplexity”, and then draws its enlightenment on the antitrust legislation and judicature in China.