<p>The contemporary focus on the digital economy as a driver of inclusive prosperity necessitates an exploration of its impact on social intergenerational mobility, a pivotal metric for gauging shared prosperity. This study conducts a theoretical and empirical analysis of how digital economic development influences intergenerational income mobility. The results reveal that the digital economy consistently reduces intergenerational income autocorrelation, indicating an improvement in mobility. This conclusion withstands various robustness tests. Mechanistically, the digital economy promotes human capital accumulation in family descendants, stimulates urban entrepreneurial vitality, and optimizes economic structure to enhance intergenerational mobility. Notably, the effect of digital economic development on intergenerational mobility is more pronounced in rural and inland areas. This research provides fresh policy insights for facilitating social mobility and achieving inclusive prosperity amidst the ongoing digital transformation. The reduction in intergenerational income elasticity due to digital economic development is estimated to be approximately 0.029 per unit increase in the digital economy index, accounting for about 53.21% of the average intergenerational income correlation.</p>