The tasks of Chinese Exegetics are to explain the ancient documents' language and sweep various conflicts and obstacles in ancient writing language.Chinese Exegetics can help us decide the language' s meaning,make one' s choice and avoid blindness in the process of teaching ancient Chinese.At the same time,it can also dredge semantic meaning,expound grammar,analyze texts' structure,illustrate rhetoric,show the historic background of an article and ancient institutions and systems.It can give us powerful favors.