There are many literary clans during the middle ancient times, which have been made a great contribution to Chinese literature, especially such as Chenjun clan Xie, Langye clan Wang, Pengcheng clan Liu and Lanling clan Xiao. But ,up to now there's no systematic or thorough study in Middle Ages' Hedong three clans(ie clan Pei, clan Liu and clan Xue) . This thesis is intended to research literary history and literary features of Hedong three clans, especially into their family tradition and family learning' a...