Under the background of China's social modernization, rural families have changed from traditional simple reproduction to modern complex reproduction, and the differences between generations of peasant families have emerged. The western theory of family modernization holds that the transformation of economic production since industrialization contributes to the individual family orientation. However, Chinese peasant family inter-generational differences of father and son generation life style is different, essentially different from western families of retrieval trend, has a "points" and "close" the double face, show the generational cooperation between points "workers" and "points" are "close", form "points" real "or" family practice modernization transformation, Promote the optimization of family resources, power structure and value concept reconstruction. While the intergenerational difference of Chinese families conflates the family modernization transformation strategy, it also contains potential risks. Based on this, under the tension of modern family transformation and reproduction of family enlargement, the family intergenerational difference in China reorganizes the family, and the flexible system of family intergenerational difference enables farmers to have sufficient resilience and security in urban and rural social mobility.