Treating the elderly migrants as a homogeneous group would weaken individual subjective initiative.Therefore, the latent class analysis method is used based on the perspective of social integration to classify the research objects into active integration and passive integration. There is heterogeneity in the preferences of residing willingness. Older people in the category of active integration prefer to choose longterm residence. It is found that the factors affecting the residing willingness of older people who belong to passive integration have increased significantly. Compared with the whole sample, the classified willingness to stay is significantly affected by personal characteristics. To accouont for the higher social integration demand and different residence intention, the government should coordinate the household registration demand and housing security of elderly migrants, actively promote the capacity construction of endowment service, constantly improve the medical security level of elderly migrants, and carry out the demonstration district construction to promote the social integration of elderly migrants.

Separation and integration of rural migrants with urban citizens in China is determined not only by the household registration system, but also by the development stage of non-agricultural industry and the conditions of rural people when they achieved the citizenship status. Having exceeded 50 percent urban in China, urban and rural populations could either keep separation, falling into the Latin America Trap, or turn to integration, leading to unified and balanced urban and rural development. In achieving integrated development between rural and urban populations, in addition to demolishing dual segmentation resulting from the household registration system, it is necessary to break off the stagnation in social class mobility due to rural and city separation, and to promote urbanization driven by non-agriculturalization, providing more development opportunity with capacity building for rural mobile population.