Abstract: Diaspora discourse, the cultural critical theory in the context of postcolonialism, transcends the category of ethnic migration with a view of the continuation of race and the inheritance of culture. From the new perspective that has gone beyond the confines of history, nationality and border, Ralph Ellisons creation as a “Marginal Man” interprets the doubleconsciousness longexisted in African American literature as an identity consciousness that seeks for national identity and cultural positioning in the global multicultural space. This represents a sense of being and politics of difference that should be acknowledged.

Key words: Ralph Ellison, diaspora, marginal man

摘要： 在后殖民语境下，文化批评话语飞散超越了种族移居的范畴，着眼于种族延续、文化传承的未来。在这一跨越历史、民族、国界的新视角下，美国非裔作家拉尔夫·埃里森的“夹缝人”书写解构了黑白二元对立，重塑了黑人人性，将非裔美国文学中由来已久的双重意识发展成为一种在全球多元文化空间中追寻民族身份和美学定位的身份观念。其背后体现的是一种要求认同的存在感，一种应被认同的差异政治。

关键词: 拉尔夫·埃里森, 飞散, 夹缝人