This study focuses on the information processing mechanism of the new generation in the Internet and new media environment in the digital era, and reveals the evolution of their cognitive mode, value orientation and behavioral decisionmaking through the framework of fuzzy information analysis. Based on communication science, cognitive psychology and fuzzy logic theory, we constructed an analytical model of “information ambiguity-cognitive processing-behavioral response”, and found that the new generation has developed unique ambiguity tolerance thresholds and meaning construction strategies in the information overload environment. Using a mixed-method approach, the study combines eye-tracking experiments, semantic network analysis, and in-depth interviews to confirm the structural influence of ambiguous information on the socialization process, value identity, and risk decision-making of the new generation. The results provide theoretical support for understanding the information processing characteristics of digital natives and practical guidance for optimizing information dissemination and youth online literacy education in the new media environment.