Postmodernism is an emerging cultural trends which appeared in the Western countries in the late 1970s ,whose main feature is to oppose any attempt to be unified and affirm the difference and relativity of things .In the field of literary theory , the main manifestation of postmodernism is to question the literature's universality and regularity by means of its historicity and complexity ,and breakthrough the past monistic literary concept .However ,its rejection of literature essence and negation of literary tradition can be easily transformed into Nihilism and unprincipled pragmatism in the ...