This paper mainly discussed the evolution from "Bian Wen" in Tang dymasty to "Bao Juan" in Song dynasty and the impact of "BaoJuan". By the analysis of a great many documentary materials and stone inscriptions, it made clear how chinese people began to believe Bodhisattva. Moreover, it proved that the earliest Baojuan in China "Xiang shan Bao Juan" was written by chan Master Pu Ming in Shangtianzhu Temple Hangzhou in Song dynasty.