In the last decade environmental policies, particularly ecological resettlement, have changed China's pastoral areas. This paper explores the difficulty in conserving rangeland through ecological resettlement. The paper focuses on how ecological resettlement policy has been translated into practice, and how the affected people responded with migration decisions. Empirical findings in a pastoral township in Inner Mongolia demonstrate that local politicians have used the projects to stress economic restructuring, promotion of non-farming activities and urbanization. Meanwhile, affected households haved used migration strategies to adapt to the changing economic and social environments rather than the changing natural environment. The difficulty of conserving rangelands and the marginalization of environmental concerns is a result of locally defined modernization development interests and the affected households' adaptive behaviours.