Abstract: In the transitional period of China,the function of traditional old age care model was weakened,and the old age problems become more and more obvious in countryside,however,in term of finance,the current social security system cannot deal with it.According the reform of social security in developed Countries,at the present,we should adopt the astrictive old age care model,which is based on private security,plays the role of private,family,collective,society and state,to fulfill the demands of the old ag...