Abstract: The shifts in residential spatial structure during the urbanization lead to clustering of specific residential spatial structure, i.e., high-end, medium-end and low-end residences. Such shifts, together with inequality of residents' incomes, cause the imbalance of social service resources distribution. On the one hand, the stratification of residential spaces brings forth diversifying demands of social services while social services in urban communities fail to address such changes; on the other hand, social services are inadequate in urban low-end communities or for vulnerable groups, because they are benefit-driven. In the face of such imbalance in the demand and supply of urban citizens' social services, the government should play a leading role in the supply, promote the diversification of related supply entities and channels, construct a mechanism fit for the supply and demand of social services, and form a supply pattern that joins efforts from the government and social organizations, so as to enhance the effectiveness of social-service supply.

Key words: urbanization, residential spatial structure, community, social services, supply