With the continuous advancement of digital media technology and the profound changes in the global cultural dissemination pattern, the participation methods and dominant position of the youth group in international cultural dissemination are undergoing transformation. Specifically, their roles have gradually shifted from recipients and objects of cultural information to producers of cultural meanings, coordinators of cross-cultural communication, and participants in civilized dialogues. This article conducts a comprehensive study on the role positioning and practical paths of the youth group in international cultural dissemination. The research focuses on their functional characteristics in cross-cultural context translation of cultural symbols, connection of cross-cultural communities, and interaction in civilized exchanges. At the same time, the research explores the mechanisms from three dimensions: life-oriented narratives, digital technology empowerment, and cross-border community collaboration. Based on this, this study further analyzes the practical difficulties faced by youth cultural dissemination, such as semantic translation losses and platform algorithm barriers. The study holds that the advantages of youth international cultural dissemination not only lie in their digital media application capabilities and innovative cultural expression methods, but also in their core capabilities of sharing daily experiences and interactive cultural experiences. To continuously enhance the international communication ability of the youth group, a collaborative enabling mechanism needs to be formed from aspects such as institutional support, optimization of platform dissemination environment, and cultivation of cross-cultural communication literacy.