Taking Beijing as a case study, this paper analyses new trends in peri-urbanisation and the city’s planning responses after 2000 in China. The results of the analysis show that the percentage of temporary migrant residents continues to grow in the peri-urban region and the social inequalities in relation to quality of life between local people and migrants have increased there. In particular, there is a concentration of thousands of young and well-educated migrants in the peri-urban region, resulting in a new kind of urban slum. Sprawling development still dominates Beijing’s fringe. New planning policies related to an urban–rural integration strategy have played a positive role in improving living conditions in rural areas and reducing the social and economic gaps between urban and rural areas in the peri-urban region. However, planning in the peri-urban region is still facing new challenges due to vertically and horizontally fragmented management, growing market forces, and social discrimination caused by the remnants of the hukou mechanism. This suggests that it will not be easy to achieve the planning goal of urban–rural integration and harmony society unless further actions are taken to enhance political capacity of planning system in Beijing. The capacity-building of planning should be facilitated if institutional innovations can be made in arrangements of power, rights, public resources, accountability, and legitimacy in the planning system.