Abstract: With Chinese social transformation and rapid economic development, migration of unmarried young people is becoming more and more common, causing the geographical expansion of the intermarriage circle.Under the double repulsive force of the population migration and the geographical intermarriage circle expansion,the traditional family pension model in rural areas has been strongly impacted.On the one hand, because of the incompleteness of rural population flow,the whole family of the outflow area is divided into many scattered families.In this process, out of rational decision-making to maximize the interests of the family,the old are usually left behind to guard the home front,rural traditional family endowment foundation has shaken. On the other hand, with a large number of rural unmarried young people moving out and choosing a spouse,the geographic marriage circle expands. Whether it is a distant marriage of a local woman or an out-of-town marriage of a local man, the inter-generational support function of rural youth and their parents tends to weaken after marriage, and rural old-age care has met new challenges.Therefore, some rural families adopt the positive coping strategy of“Inter-generational emotional solidarity—intra-generational exchange of interests”to adjust.It is of great social practical significance for rural families to go out and provide for the aged.

Key words: geographical intermarriage circle, population migration, old-age care in rural area