Abstract: The moral factor has been a kind of enduring strength influencing foreign policy of America that can't be neglected. The doctrine that America is an exception, the moral principle that pragmatism is supreme and the principle of "humanism" intervention are three moral props supporting war of anti-terrorism of America. Behind the "moral responsibility", its purpose is for extending values of America in the whole world.

Key words: America, war of anti-terrorism, moral basis

摘要： 道德因素已经成为影响美国对外政策的一股不可忽略的、恒久的力量。“美国例外”主义、实用主义至上的道德原则和“人道主义”干涉原则是支持美国反恐战争的三大道德支柱。“道德责任”的背后是为了在全球推广美国价值观。

关键词: 美国, 反恐战争, 道德基础