数个世纪以来,青藏高原文明的发展源远流长,研究发现西藏文明的历史长河中,存在着这样一个奇特的历程现象:七世纪以来,以吐蕃王朝建立为代表而发展起来的扩张性文明,到九世纪吐蕃王朝覆灭以后便戛然而止,逐渐消失了它的锐气,走向包容与内敛。这一现象与蒙古、萨拉森、塞尔柱突厥等同为扩张性游牧民族存在着较大的区别。本研究目的在于分析西藏文明在发展中所经历的变化,特别是后弘期佛教传入对西藏的影响,探讨其内敛化的原因。结果认为藏传佛教在西藏文明内敛化的发展中起到了关键性的作用。 Over the centuries, the development of civilization in the Qinghai-Tibet Plateau has a long history. It has been found in the long history of Tibetan civilization that such a peculiar phenomenon of history exists: the expansive civilization developed from the establishment of Tubo Dynasty since the seventh century, After the collapse of the century Tubo Dynasty, it came to an abrupt end, gradually disappearing its erudition and moving toward tolerance and restraint. This phenomenon is quite different from that of Mongolia, Sara Sen and Seljuk Turks for expansive nomads. The purpose of this study is to analyze the changes that have taken place in the development of Tibetan civilization, especially the influence of Buddhism introduced to Tibet in the late Han Dynasty, and explore the reasons for its introvertedness. As a result, Tibetan Buddhism played a key role in the development of Tibet’s civilized intrusiveness.