In the process of the new rural social pension system being carried out,it is one of the key issues how to realize the link-up of the rural social pension insurance and family supporting, land security and social assistance. In the short term,middle and long term,we simulate the endowment level of two series of peasants and test its moderation. According to the conversion and link-up process of the rural social pension insurance, the family supporting and the social assistance,the difference and substitution old-age scheme for two series of elderly peasants is proposed. In the short term,we should play the substitution effect of the family supporting,the land security and the social assistance on the rural social pension system. In the middle and long term, we should improve the rural social pension system and raise its benefit,in order to weaken the oldage substitution function of the family security and the social assistance gradually.