Abstract:Nowadays,rural land bears the double functions of rural economic development and survival guarantee for farmers. The right to contracted management of land has shown obvious conflicts with farmers’ right to social security,which,to a certain extent,limits the efficient utilization of land resouces and at the same time hinders the construction of rural social security system.This paper analyzes the essential differences between land gurantee and right to social security in nature,overlapping of interior and exterior conflicts in social functions and the priorities in right protection.Therefore,this paper puts forward three enlightenments:the efficient utiliztion of right to contracted management of land is the material basis to realize farmer’s right to social security,the efficient utilization of right to contracted management of land cannot do without the realiztion of farmers’right to social security and right to contracted management of land and farmers’ right to social security shall perform its own functions.