The dataset complements a study that examines the effectiveness of social media-based sex education interventions using feminist methods in China. It includes qualitative transcripts of interviews with 10 sex educators and 18 young people, as well as an interview guide outlining the topics of the study. In addition, quantitative data from a randomized controlled trial were provided, which included responses from 422 participants aged 18-29 years collected through a questionnaire. This dataset supports the use of feminist approaches to explore perceptions of social media-based sex education and to assess the impact of interventions on Chinese adolescents' attitudes towards sexual violence and gender norms.