混血儿的身份问题是拉森在《越过种族线》中关注的问题。本文从文化身份认同的角度出发,分析《越过种族线》中主人公克莱尔从最初成功越界冒充白人到最终回归黑人社会的文化身份认同之旅,指出处在文化夹缝中的混血儿只有充分肯定自己的黑人文化身份才能在种族二元格局的美国社会找到归属感。 The issue of biracial identity is a matter of concern to Larson in “Crossing the Race Line.” From the perspective of cultural identity, this article analyzes the cultural identity of the protagonist Clare in “Crossing the Race Line” from the initial successful cross-border factionalization to the ultimate return to black society, pointing out that only the half-breed Cultural identity can find a sense of belonging in American society in the duality of racial patterns.