Using three waves of panel data from the China Family Panel Studies,this study empiri-cally tests the impact of rural-urban student mobility on labor supply decisions in rural households using time fixed effects panel model and instrumental variable model.The research finds that:1)Rural-urban student mobility leads to a 7.75%decrease in the participation in paid labor among rural households,with no significant impact on time spent in paid labor,and results in an 11.28%increase in participation in non-agricultural labor.2)Mechanism analysis shows that these results are due to adjustments in labor division within rural households,where the primary market labor contributors tend to increase their time in paid la-bor,while those mainly responsible for household labor tend to exit market sector labor or engage in non-agricultural labor in urban areas for the purpose of accompanying their children in education.3)The im-pact of rural-urban student mobility on labor supply decisions varies across different stages of schooling,ranges of mobility,and generational structures.Based on these findings,targeted policy recommendations are proposed from three perspectives:sharing the educational costs of rural-urban migrant students,sup-porting employment for rural parents accompanying their children,and providing differentiated assistance in various contexts.