The migration initiative in Shaanxi, starting in 2011, stands as the inception of China's poverty alleviation relocation policy, encompassing diverse goals of livelihood enhancement, poverty eradication, and ecological preservation. Over the subsequent decade, spanning the “12th Five-Year Plan” relocation strategies targeting disaster avoidance, ecological relocation, and the “13th Five-Year Plan” aimed at poverty alleviation, Shaanxi witnessed 3,160,900 impoverished individuals transitioning away from the dire circumstances of unviable sustenance. Through extensive collaborative research, our team meticulously probed the ecological landscape of Shaanxi's relocation zones and the well-being of relocated farmers. We conducted surveys and policy evaluations in 2011, 2015, 2019, and 2021, carving conceptual frameworks, innovative pathways, and scientific methodologies to appraise relocation policies and address the complex issues surrounding household population dynamics and sustainable livelihoods in impoverished western mountainous regions. Our contributions span multiple fronts. First, we assessed the livelihood effects of poverty alleviation relocation in Shaanxi. The study found that the changes in the livelihood strategies of the relocated farm households basically conform to the direction of the government's promotion of the transition of farm households' livelihoods to non-farming activities, but the changes are more often reflected in farm households that have already been involved in non-farming activities, which have strengthened their non-farming livelihoods through the redeployment of intra-household labor, which has contributed to the optimization of the livelihood structure of the households to a certain extent. Second, the poverty reduction effect of poverty alleviation relocation in Shaanxi is assessed.The study found that the poverty alleviation relocation for poverty alleviation has a significant poverty reduction effect, and compared with the non-relocation scenario, the income of farm households in the poverty alleviation relocation scenario is significantly higher, the incidence of poverty is lower, and the depth and intensity of poverty is also reduced. Poverty alleviation relocation has a greater impact on the income gap of farm households, which has widened in the context of relocation compared to the non-relocation scenario. Third, the ecological effect assessment of Shaanxi's poverty alleviation relocation was made.The study found that land-based poverty alleviation relocation has brought good ecological benefits to the ecologically fragile areas in Shaanxi. The easy poverty alleviation relocation project increased the forest cover in southern Shaanxi, brought multiple ecosystem service functions, reduced the area of sloping cultivated land in mountainous areas, which directly reduced soil erosion and chemical deposition of nitrogen, phosphorus and other chemicals in the Han River Basin, and brought savings in the cost of water purification to the downstream water-using regions of the South-to-North Water Diversion Central Route, as well as carbon sequestration benefits on a global scale. Fourth,we have made the targeting optimization of the “response-participation” policy of Shaanxi's relocated farmers. It analyzes the internal mechanisms and influencing factors of farmers' response, evaluation and participation in policies in different contexts and modes; and, based on the analytical framework of “governmental support-enterprise traction-farmers' poverty eradication”, it systematically and comprehensively summarized the poverty alleviation model of “community factories” for poverty alleviation and relocation in Shaanxi, which is of great value in enriching the theories of population relocation, livelihood resilience, employment-type poverty alleviation, rural revitalization, and public policy analysis, among other relevant theories. [ABSTRACT FROM AUTHOR]