Abstract: Livelihood is an important issue in the urbanization of ecological immigrants in nature reserves,and the livelihood response of immigrants should not be ignored to understand and solve this problem.Based on the "four-dimension and three-intensity" livelihood response analysis framework and measurement method,this paper measures the livelihood response of migrant farmers in nature reserves ofWuling Mountainous area,taking the survey data of 261 migrant farmers in Xiaoxi National Nature Reserve as the sample.It is found that the immigrant livelihood capital response is uneven and the immigrants' ability to obtain capital is weak,the immigrant households' livelihood style response is the best,but there are great differences among the immigrant households.The response of livelihood output of immigrant households is more obvious,especially the action response of livelihood output is the strongest,the spatial response of livelihood of immigrant households is relatively weak,but the difference between immigrant households is relatively small.The results show that the livelihood response of migrant farmers in nature reserves in Wuling Mountainous area is generally good,but the livelihood response intensity of migrant farmers decreases successively in their perception,willingness,and action,and the livelihood spatial response and material capital response of migrant farmers still have much room for improvement.In addition,the dimension and intensity of migrants' livelihood response strengthen or restrain the mechanism of increasing migrants' livelihood income,which in turn affects the sustainable development of immigrants.In order to enhance the response intensity,form the ability of sustainable livelihood,and realize the sustainable development of immigrants,we should properly respond to various impacts of the external environment,respect and stimulate the active choices of the main body of livelihood,and form a positive cycle of the immigrants' livelihood response and income increase mechanism.

Key words: ecological migration, urbanization resettlement, livelihood response, measurement, Xiaoxi National Nature Reserve