The Binglin Cave-temple was a vibrant way station on the Old Silk Road. As a pivotal points of mountain and water along the great trade route,the five main branches of route concentrated here on the eastern end of the Silk Road:the Southern road of Qinlong Route,the mid of Qiang Clan Road,the ancient road of the Tang and Tibetan,The Datouba Valley route,Hongchiling Route. By a carful study of inscriptions written by donors in Bingling Cave-temple and other relative historical records,this article tries to prove surely that the important role Bingling Cave-temple had played on the Ancient trade route and gives a new evidences for the site to be on the list of World Heritage.