The thesis uses the various editions of Norton Anthology of American Literature as the primary materials to observe the recanonization of major American literary writers in anthologies of American literature under the influence of American multiculturalism in the last 30 years. In the description of the increasing concern this authoritative anthology of American literature shows for the minority literatures, the thesis reveals that minority literatures are being paid greater attention in the United States and have made important contribution to the development of American literature.