Abstract: Henry Cabot Lodge's unilateralism is closely related with the United States's traditional thoughts and personal experience.Lodge's unilateralism includes that America can participate in international affairs freely.According to Lodge's unilateral thoughts,America executes flexible policies in the Latin America,the European area and the Asian mainland in order to the United States national interests.The diplomatic thought the rise of major powers the United States a true reproduction of diplomatic options,even today is still deeply affected U.S.foreign policy.