Abstract: The national poverty alleviation information system,an important data carrier for poverty alleviation,provides data support and decision-making basis for the precise implementation of the poverty alleviation program.Essential as it is,there has been a tendency of the data’s being distorted and difficulty in information's being disclosed,blocks which stand on the way of its function optimization.This paper,based on the advantages of decentralization,traceability and unforgeability of blockchain technology,employs a multi-case study approach to explore the evolution path and characteristics of Guiyang Poverty Alleviation Information System,“Chongqing Blockchain Public Service Platform” and “Sichuan Blockchain+Agricultural Industrialization Platform (new version)”.The findings tell three key elements affecting the application of blockchain technology,and in conclusion is put forward the feasible path of function optimization of the state poverty alleviation information system based on blockchain technology,and a theoretical framework for the function optimization is constructed.The paper is aimed at providing useful exploration for promoting the accurate management of national poverty alleviation information,improving the level of poverty alleviation information governance and the modernization of national governance capacity.

Key words: blockchain, social governance information system, poverty alleviation information system, multi-case study, function optimization path