Abstract: The pension security of pensions who have lost countryside land is currently one of numerous social problems which are urgently resolved. At the present, the reasons of rights imperfection of the pension securing of peasants who have lost countryside land in country are, the countryside land property right is unclear, the land market is imperfect, Purchase land on a requisition basis compensating system being not impartialness enough, government self-discipline behavior is imperfection, the city and countryside social security development is not balanced. The model of “land exchanging for security” is one kind of effective pattern in resolving a train of thought, because of land exchanging for security will strengthen guarantee strength solving the extra worries which the farmer cares for the aged, it will promote the orchestrate of the city and the country, strengthen the guarantee system of the village society construction. And also manifest "harmonious and fair", reply to this age crisis of peasants who has lost countryside land effectively. For insuring this mode bringing up, we have to innovate the land reform system plat farm of " land exchanging for security ".perfect the mechanism fund inspection mechanism, insuring the economic source of" land exchanging for security ",put up and perfect the legal assistance system of peasants who has lost land.
Key words: Peasants of Land-expropriated, Social Security Pension, Land Exchanging for Security