“民主和平”是冷战结束以来西方，特别是美国国际关系政策和理论研究中的一个重点话题，不同的理论流派和理论立场对民主和平论的争论还远远没有结束。这场争论的重要性并不只在于如何显示不同的理论立场，而在于它所反映出的政策影响和可能的理论发展趋势。因而，较为全面地检索民主和平论在西方国际关系理论中的起源、发展，探讨这一理论主张兴起的理论和政策背景就具有非常重要的意义。本文首先介绍以康德为代表的有关和平问题的西方国际关系理论的自由主义传统，其次分析民主和平论在８０年代兴起的理论和政策背景，并对民主和平论的各种具有代表性的观点、论据以及演绎方法加以总结，力求对民主和平论进行系统的介绍和剖析 “Democratic peace” is a key topic in the study of the policies and theories of the West, especially the U.S. international relations since the end of the Cold War. The debate on the theory of democracy and peace between the theoretical schools and the theoretical standpoints is far from over. The importance of this debate is not only about how to show different theoretical positions, but rather on the policy implications and possible theoretical trends that it reflects. Therefore, it is of great significance to retrieve the origin and development of the democratic peace theory in the theory of western international relations more completely and to explore the theoretical and policy background of the rise of this theory. This article first introduces the liberalism tradition of the western theory of international relations represented by Kant on peace and secondly analyzes the theoretical and policy background of the democratic peace theory that emerged in the 1980s and various representative opinions on the democratic peace theory, Arguments and deductions to summarize, and strive to systematically introduce and analyze democracy and peace theory