In Adventures of Huckleberry Finn, Huckleberry Finn shapes a unique individual image by adapting to various contexts, revealing the possibilities of self-realization and growth that humans seek in the face of challenges and difficulties. This paper analyzes Huck’s multiple pragmatic identity construction from the perspective of contextual correlates of adaptability, aiming to address the following questions: (1) How does Huckleberry Finn conduct his multiple identities in the three contexts (physical world, social world, and mental world) through conversation? (2) What pragmatic functions does Huckleberry Finn perform in a specific conversation? (3) What are the influencing factors behind the construction of Huckleberry Finn’s identity? Analyzing Huckleberry Finn’s multiple identity construction from the perspective of contextual correlates of adaptability can help us gain a deeper understanding of how the work shapes Huck’s complex and varied identity by adapting to different contexts, thus revealing the close connection between character growth and social change, as well as how literary works reflect and critique social realities through character identity construction. This research not only contributes to enriching the theoretical perspectives of literary criticism but also provides new insights for understanding the profound meanings and humanistic values of the work.