The land-expropriated farmers are faced with the double dilemma of the static unbalanced development compared with other groups and the inadequate dynamic development under social progress,which has become the specific and particularly prominent carrier of the major social contradictions in the new era in China. However,the practice of social security supply with the mission of promoting social fairness and resolving social conflicts for land-expropriated farmers has not responded effectively to this problem. There are obvious structural obstacles in the supply side formed by supply subjects a...