Abstract

With social media becoming the core interactive medium in the digital age, people's expression of moral stance and moral practice on these platforms have gradually become the focus of research. Existing studies mostly focus on discussing online behaviors or moral norms separately, lacking a systematic analysis of the process of moral stance construction and the interaction between moral practice and mainstream standards. This study adopts a qualitative literature synthesis method, combined with NVivo 12.0 software for coding assistance. This study systematically retrieved the top journal literature in this field from the Web of Science, Google Scholar and CNKI (China National Knowledge Infrastructure) databases from June 2023 to June 2025. It strictly screened the included and excluded items according to the inclusion and exclusion criteria, and finally selected 45 core studies for in-depth analysis. The study focuses on two major issues: how people construct and express moral stance in social media participation, and how moral practice in social media reflects or reshapes mainstream social moral standards. The study finds that moral stance is mainly constructed and expressed through three forms: comment wording, filter of forwarding, and content creation, and is significantly influenced by critical thinking and digital literacy. Moral practice reflects and reshapes mainstream social moral standards and also gives rise to new norms such as digital empathy. The improvement of critical literacy in social media can strengthen the positive reshaping effect of practice on standards. This study provides a focused theoretical reference for digital ethics research and a scenario-based practical direction for moral education.