China is at the late stage of modernization with rapid population ageing, in which multigenerational relationship family network has become normal. Multigeneration relationship family network has a richer meaning than the tradition definition of family, and is also functionally important. Based on the social network analysis, six typical families are studied. It is found that the physical space and virtual space of family network are overlapped, and the spatial dispersion does not cause the psychological separation among family members. The multigenerational relationship of family demonstrates a variety of network types including complete solidarity, double axis solidarity, basic solidarity, partial solidarity, and differentiation. The content and direction of family intergenerational support are diversified. The flow direction and amount of different resource types are dissimilar, and the center of family relationship network and the connection mode among generations are also different. The reciprocity of family intergenerational relationship does not happen immediately, and the reciprocity would be more meaningful when it spans over individual life cycle and family life cycle.

Based on multiple survey data, the paper analyzes the situations and characteristics of family care arrangements for children aged 0~5 in China. Conducted by different organizations between 2010 2014, the multiple surveys show high childcare deficits, heavy burdens of mothers, imbalanced responsibility between motherhood and fatherhood, and a high proportion of childcare by grandparents. These problems not only directly affect the healthy growth of children, women??s employment and development, and the quality of family life, but also affect the implementation of the two-child policy. One of the key reasons of these problems is the lack of institutional support for childcare, particularly the shortage of formal care for children under age 3. “Work-family” balance has become a universal and rigid social needs. From a macro point of view, childcare is a necessary condition for population reproduction. From the perspective of family policy, it is necessary to extend the paternity leave and parental leave, to develop formal care agencies for children aged 0 ~ 3, and to promote the balance of workfamily for childcare givers.