Abstract: In terms of the issue of land-expropriated farmers' citizenization,many scholars studied it from the perspective of social structure,social exclusion,and social psychology. From the analytical perspective of social space,this article analyses the old broken and the newly rebuilt social relation network of the land-expropriated farmers,finding the reason of the plight of the land-expropriated farmers' citizenization was the restructure of social space. This kind of space restructure leads to the segregation of space,the merchandise of public space,the commercialized daily life and the personalized space,and therefore leads to the fact that the land-expropriated farmers are hard to be involved into the urban space and finally are marginalized.