自1994年国际互联网接入中国后，网络技术近三十年的飞速发展不仅改变了人们的生活习惯，还为互联网文化的形成提供了全新语境。在21世纪数字化、信息化和网络化等社会快速变革的背景下，青年的话语权不断加强。哔哩哔哩视频弹幕网站（下简称B站）经过十四年的发展，立足于自身用户生产内容的特别机制，平台受众逐步从小众走向大众，成为中国青年群体高度聚集的综合性视频文化社区。B站在成长过程中每个时期的文化样态，也反映出了中国互联网文化中B站青年文化独特的话语特征。

本文以B站青年文化为研究对象，采用费尔克拉夫的话语理论进行研究。第一部分对中国互联网发展历程进行了历史维度上的梳理，结合前人研究成果，提出了当前互联网语境下的青年文化在文化生产主体和话语环境等方面已经形成了全新的时代背景。第二、三、四部分则运用费尔克拉夫的话语框架中的三个向度对B站青年文化进行深入的话语研究。在文本分析方面，选取时间跨度长、具有平台代表性的“周刊哔哩哔哩排行榜”每周榜首视频，将其标题及标签文本形成可视化词云图，总结梳理出B站“ACG亚文化（2009-2014）”、“搬运恶搞（2015-2017）”和“正向多元（2018-2023）”三个话语表达的具体阶段。在话语实践方面，从B站平台不同时期的定位特点和表现形式，发现B站在趣缘圈层网站、资源分享平台和青年文化社区的三个时期，由于其平台话语实践特点转变而产生的多样话语实践目的。社会实践方面，从历史维度分析政治权力话语、商业资本话语和传媒舆论话语在社会空间对B站青年文化话语的塑造和影响。第五部分着重论述了B站青年文化对主流文化的主动适应与自身文化的进阶方式，从引导正确价值认同和助力文化自信自强两个方面阐释B站青年文化对社会氛围和文化建设的正向影响，最后提出B站青年文化要避免过度娱乐化的倾向，并提供了一些解决策略。本文对于研究互联网青年文化具有重要的样本意义，通过对B站青年文化从小众到大众演变过程的分析研究，对B站青年文化的未来发展具有一定的启发价值和意义。

Since the international access to the internet in China in 1994, the rapid development of network technology over the past thirty years has not only changed people's living habits but also provided a new context for the formation of internet culture. Against the backdrop of the rapid social changes brought about by digitization, informatization, and networking in the 21st century, young people's voice has been constantly strengthened. Bilibili video barrage website (hereinafter referred to as Bilibili) has developed for fourteen years, relying on its special mechanism of user-generated content production, gradually moving from a niche audience to a mainstream platform, becoming a comprehensive video culture community highly concentrated among young people in China. The cultural characteristics of the youth culture in Bilibili during each period of growth also reflect the unique discourse features of the youth culture in Bilibili in the context of Chinese internet culture.

This article takes the youth culture in Bilibili as the research object and adopts Fairclough's discourse theory for analysis. Part one reviews the historical development of China's internet, combines previous research findings, and proposes that youth culture under the current internet context has formed a new era background in terms of cultural production subjects and discourse environment. Parts two, three, and four use the three dimensions of Fairclough's discourse framework to conduct an in-depth discourse analysis of  youth culture in Bilibili. In terms of textual analysis, the weekly top-ranking videos of "Bilibili Weekly Ranking List", which have a long-time span and representative of the platform, were selected to form a visualized word cloud diagram of their titles and tags, summarizing and sorting out the specific stages of the three discourse expressions of "ACG Subculture (2009-2014)", "Transferred Spoof (2015-2017)", and "Positive Diversity (2018-2023)" in Bilibili. In terms of discourse practice, it was found that Bilibili had diverse discourse practice purposes due to the transformation of its platform discourse practice characteristics in the three periods of interest circle websites, resource sharing platforms, and youth culture communities. In terms of social practice, this article analyzes the shaping and influence of political power discourse, commercial capital discourse, and media public opinion discourse on  youth culture in Bilibili in the social space from a historical dimension. Part five focuses on discussing the proactive adaptation of Bilibili's youth culture to mainstream culture and the advancement of its own culture, interpreting the positive impact of the youth culture in Bilibili on social atmosphere and cultural construction from two aspects of guiding correct value identification and supporting cultural confidence and strength, and finally proposes that Bilibili's youth culture should avoid the tendency of excessive entertainment and provides some solutions. This article is of great sample significance for studying internet youth culture, and through the analysis of youth culture in Bilibili evolution from a niche audience to a mainstream platform, it has certain enlightening value and significance for the future development of the youth culture in Bilibili.