十九世纪以来,西洋的火药史专家们极力从欧洲、亚拉伯和波斯的中古文书内寻找蒙古西征用火药的证据但没有找到;我们从中国文书内也一样的没有找到。所以这是个久悬而未决的问题。这一篇文章是想来回答这一个问题。一二一八年,成吉思汗西征,灭了盗窃西辽的乃蛮屈出律,於是蒙古的兵力西达中亚西亚,而直接和花剌子模Khorazm接触。在那以前,有回教徒三人为花剌子模人贩绢入蒙古境,见成吉思罕。成吉思命蒙古境内四百五十个回教徒携带珍贵物品随着他们西去购易物品。到了细浑河上讹答剌Otrar地方为花剌子模的守兵所获,被当作蒙古间谍杀了。成吉思汗大怒, Since the nineteenth century, the history of gunpowder history in the West has struggled to find evidence of the illegal use of gunpowder in Mongolia from among the Middle Eastern instruments in Europe, Arabia and Persia. We have not found the same in Chinese instruments. So this is a long pending question. This article is to answer this question. In January 1818, Genghis Khan marched westward to exterminate the theft of the West Liao. Therefore, Mongolia’s troops were west of Central Asia and came into direct contact with the Khwarzm. Prior to that, there were three Islamists who, as Khwarizs, sold human beings to Mongolia. Cheng Ching lives in 450 Muslims in Mongolia carrying precious items as they go west for easy items. To the fine river mistakenly assassinated Otrar place for the Khwarz sub-mold soldiers won, was killed as a Mongolian spy. Genghis Khan furious,