The ultimate goal of accurate poverty alleviation is to achieve the poverty alleviation of the poor and the sustainable development of livelihood after poverty alleviation. With the work of getting rid of poverty in full swing，the appearance of rural areas and the living standards of farmers have been significantly improved，but there are also some problems，the most important problem is the sustainability of poverty alleviation. Based on the results of field investigation and empirical analysis，this paper holds that the purpose of poverty alleviation is to get rid of poverty fundamentally，so we must establish a long-term mechanism to block poverty. Including the poverty diagnosis mechanism，the poverty eradication mechanism，the early warning mechanism for returning to poverty，the poverty repression mechanism and the poverty alleviation and consolidation mechanism，It also puts forward the measures of poverty alleviation with financial capital as the main body，human capital as the main body to solve the problem of “double support of ambition and intelligence” of poor households，and natural capital as the main body to develop the livelihood measures under ecological protection. Sustainable livelihood countermeasures and suggestions，with social capital as the main body，poverty alleviation through industrial development，and material capital as the main body to ensure infrastructure construction in poor areas，Strive to explore a new path in the construction and implementation of the long-term mechanism of poverty blockade，so as to provide countermeasure support for ensuring the sustainable livelihood of the poor and the poverty blockade mechanism.