With the deepening of globalization and the increasing frequency of cross-cultural exchanges, Asian films have gradually emerged in the international film market and become an important bridge connecting the East and the West. As a classic Asian film, The Joy Luck Club, with its unique narrative and profound thematic connotation, has attracted the attention and love of many audiences. In the movie, the phenomenon of code-switching appears frequently. This paper applies Verschueren's theory of linguistic adaptation to analyze the cultural adaptation embodied in the phenomenon of code-switching in The Joy Luck Club, so as to analyze the impact of code-switching on the cross-cultural communication of Asian families. It reveals the complex mentality of cultural identity, identity construction and conflict resolution of Asian groups in cross-cultural communication.