About the Eight Buddhas painted on the northern wall of Cave 285 at Mogao grottoes and the names of Eight Buddhas of the Eastern Quarter,scholars have raised five opinions to explaining origin sources of Buddhist Sūtra for creation the mural.Based on the study the second volume of Pratyutpanna buddha sammukhvasthita samdhi sūtra which was translated by Fa Zhong (397 439) and other references,this paper brought forwards an opinion that eight Buddhas of the Eastern Quarter are arranged as following order:Amityur Buddha?Sakyamunni Buddha?Sipasyin Buddha?Sikhī Buddha?Visvabhuk Buddha?Krakucchanda Buddha?Kanakamuni Buddha, Ksyapa Buddha.