<p>Addressing the challenges of rural revitalization in the context of rapid urbanization—including the population decline, insufficient infrastructure, and the disintegration of kinship networks of ethnic minority villages—is essential for achieving sustainable rural development. This paper studied Yubu Village, an ethnic Yi community in China’s Liangshan Yi Autonomous Prefecture, with the aim of investigating the spatiotemporal evolution and reconstruction of its kinship networks. To achieve this, 20-year in-situ data between 2003 and 2023 were collected, including occupation, population mobility, and kinship ties of Yubu Village. Kinship networks for 2003, 2009, and 2023 were then built through social network analysis (SNA), by calculating key indicators such as network density, k-core, and degree centrality. ArcMap was employed to project these network structures into geographic space, enabling analysis of the spatiotemporal evolution of village population hollowing; additionally, a regression equation model was established to identify factors influencing changes in the kinship spatial structure. The results have revealed: (1) The overall closeness of kinship ties in Yubu Village has decreased annually, with local stability declined, leading to a gradual loosening of traditional family connections; (2) The village’s overall spatial pattern has changed over time, showing sparse local distribution and varying degrees of change across six subgroups; (3) Kinship structure changes have been influenced by various factors including infrastructure, socioeconomic conditions, and cultural heritage, with dynamic evolution over time. From socioeconomic, infrastructure, and cultural heritage perspectives, future strategies have been proposed to guide ethnic village protection and contribute to the international literature of rural studies, providing valuable references for rural revitalization in ethnic regions of western China.</p>