Wei,Jin,Southern and Northern,Sui,Tang and Five Dynasties are known as the middle ancient ages in the history of Chinese literature.The newly unearthed documents will contribute to a reexamination of literary background, literary evolution,literary ontology and stylistic form of these dynasties to correct the traditional heavy reliance in literary history on longitudinal combing.First,unearthed documents play an important role for the research on regional literary history to regain the initiative.Second,the research on unearthed documents is helpful to probe into the literary phenomena buried by history.Third,unearthed documents are significant for the research of essay,especially for the further study on stylistic forms dominated by practical writing.Because unearthed documents are excavated in odds and ends by accident,they should be compared with historical recordation in study.A comprehensive perspective of socialcultural science,based on the restoration of unearthed texts,will thus shed light on the natural process of birth and growth of literature.