本文运用后殖民主义作家霍米·巴巴的“第三空间”理论,分析美国华裔女作家任璧莲《典型的美国佬》中主人公拉尔夫一家自我身份的重构以及中美两种文化一定程度上的融合。在不同时期的中美文化观影响下,他们寻梦过程中所发生的价值观、生活方式和身份认知等的交错杂糅性转变表明了文化身份的流动性。任璧莲认为身份总是处于不稳定的变动之中,没有固定不变的本质。 This paper analyzes the self-identity reconstruction of protagonist Ralph in “Typical American Guyan” by American post-colonial writer Homily Baba by using the “Third Space” theory of post-colonial writer Hmie Baba and analyzes the relationship between Chinese and American cultures The degree of integration. Under the influence of the Sino-American cultural views in different periods, the interdependent and heterogeneous changes of values, lifestyles and identities in their dream-hunting process indicate the fluidity of cultural identity. Ren Bi Lian that the identity is always in the unstable changes, there is no fixed essence.