As global sustainable development goals progress, improving the welfare of vulnerable rural populations has become a critical issue for many countries. Using data from the China Family Panel Studies (CFPS) from 2014 to 2022, this paper examines the impact of Digital Rural Construction (DRC) on the welfare of disadvantaged rural children. Specifically, it explores the mechanisms through which DRC enhances child welfare, focusing on information access, educational resource availability, and medical service accessibility. Additionally, the roles of government and non-governmental organizations in moderating this process are analyzed. The findings show that DRC significantly improves children’s health, education, and psychological well-being. Furthermore, interventions by governments and non-governmental organizations amplify these positive effects, with non-governmental interventions proving particularly effective. This study not only addresses a gap in the literature on the mechanisms linking DRC and child welfare but also offers valuable insights for policymakers from a sustainability perspective.