笔者提出郑和下西洋的动因是:政治上朱棣为实现朱家王朝千秋万代永远传承、实现“永乐盛世”的宏伟梦想;经济上朱棣为满足国内生产、生活需要,解决国内原材料供应不足的矛盾;外交上实现睦邻友好、和平共处、共同发展政策的具体目标。而寻找建文帝与郑和下西洋没有因果关系。 The author proposes that Zheng He’s motive for going to the Western Ocean is that in his political affairs Zhu Di realized the magnificent dream of “forever prosperity” for the generations of the Chiu Ch’iu dynasty and the prosperity of the whole country. In order to meet the needs of domestic production and life, Zhu Di economically solved the problem of insufficient supply of raw materials ; The diplomatic goal of achieving good neighborliness and friendship, peaceful coexistence and common development policies. There is no causal relationship between finding Emperor Wen and Zheng He on the West.