Abstract: In this study, the transformation of foreign policy from massacre to pacification during the building process of the Mongolian Empire in the 13th century was discussed in detail. It is suggested that this transformation was facilitated by four factors, changes of ideology, the appreciation of farming culture, requirements to consolidate its power and the interpenetration of different cultures.

Key words: Mongolian Empire, massacre, nomadic culture, farming culture

摘要： 深入剖析13世纪蒙元政权在对外征伐过程中屠戮政策的转变原因，结果表明：蒙人的屠戮政策之所以发生变化，主要涉及蒙元政权征服政策之转变、蒙人对中原文化之向往、蒙元统治者巩固政权之需要、蒙宋文化碰撞与交融四个方面的要素。文化是一个国家的灵魂，蒙元屠戮政策之转变是蒙宋文化碰撞的结果。

关键词: 蒙元, 屠戮, 游牧文化, 农耕文明