This thesis aims to study factual and fictional in "Lisao",and analysis Qu Yuan's sentiment by Fancy and Reality Interrelated. First,this thesis compare "Lisao" and history to understand Qu Yuan's realistic environment and mental status. further analysis Qu Yuan's Emotional changes. And writing structure in fictional. In Fancy and Reality Interrelated, a part of word have regularity in "Lisao".and have contradistinction. The contradiction and conflict of Qu Yuan's heart appears the contradistinction. This thesis further explanation the phenomenon. and think the phenomenon can reflect Qu Yuan's heart between factual and fictional.