Wang Xizhi, a Chinese calligrapher of the Jin dynasty, is traditionally honored as the Sage of Calligraphy in view of his profound influence on the calligraphic art of China. In Dunhuang and Turfan documents, the Shang Xiang Huangqi Tie(a kind of copybook) by Wang Xizhi is the most reliable and important extant calligraphic document. On the basis of secondary research data from other scholars, the author here conducts a textual research on 26 fragments of Dunhuang manuscripts, verifies 14 fragments of Shang Xiang Huangqi Tie through identification of penmanship, and explains the academic value of these works for the research of calligraphy.