Abstract: Xiao Yan, Xiao Tong, Xiao Gang and Xiao Yi are both the rulers of Liang Dynasty and the famous literateur, their literary theory becomes the lighthouse which guides the literary style of that time. On the one hand, they followed and respected for the traditional theory; on the other hand, theirs cater for time spirit. however，theyre Contradictory sometimes. The present paper introduced the “developmentliterary theory” of the rulers, Xiao Shi of Liang Dynasty.