The purpose of this study is to explore the significance of an "oppositional" literary practice known as L=A=N=G=U=A=G=E Poetry, and to demonstrate the social and political value of its project. Although the Language poets have dissenting voices among themselves, they can be loosely grouped under their tendencies-a restoration of "the reader as a co-producer of the text" and an emphasis on "the materiality of the signifier," and the dissolution of theory into poetic practice and vice versa. The relation of poetry and theory seems to be one of the crucial issues now in understanding how poets` theory has come to confront the expanding crisis of poetry. Language writing seems to offer hope for breaking down the impasse between poetry and theory that has led to the marginalization of poetry within the academy. The notion of a theoretical poetry unsettles all of our expectations about poetry, raising troubling questions about the status of the individual poem. Thus my focus will be that seemingly hermetic language of Langrage poetry, growing out of a critique of referentiality and "the narrowness and provincialism of mainstream literary norms" contributes to the pluralization and decentralization of American poetry, not only in an aesthetic nature but also in a political one. Furthermore, it provides us with alternative literary histories, alternative ways of reading, and alternative conceptions of poetry. In conclusion, to know this diverse body of Language writing (poetheory and theorypo) is to enlarge our sense of what poetry is and what poetry can be, as well as our understanding of the present.