Abstract：In the history of Chinese art and literature aesthetics, Liu Xie is an important figure of making the Ya and Su theory in the field of aesthetic category, and giving it an comprehensive explanation. He attaches great weight to aesthetic view of worshiping and upholding Ya, from comparision and change of Ya and Su to the literary aesthetics phenomenon, he praises Ya's beauty of sacred literary, stresses literary and he thinks that artistic creators must concern their own cultivation.
