“九一八”事件牵涉各方远东外交政策,美国作为远东拥有重要利益的大国,其这一时期外交政策走向对国际局势具有重要作用。最终,在日本的武力下,美国所构建的华盛顿体系逐渐走向了破产。本文试图沿着事件的发展分析美国这一时期的外交走向。 The “September 18th” incident involved the Far East foreign policy of all parties and the United States, as a great power with far-reaching interests in the Far East, the foreign policy of that period played an important role in the international situation. Finally, under the Japanese military force, the Washington system built by the United States gradually went bankrupt. This article attempts to analyze the diplomatic trend of the United States during this period along with the development of the incident.