Abstract: Taking Nanjing city as an example, based on the assessment of resource and environment carrying capacity and the trend of environmental coercive pressure in each district, this study comprehensively judged the monitoring and early warning level of resource and environment carrying capacity in Nanjing city, analyzed the causes of overload, and proposed corresponding control countermeasures and suggestions. In this study, the monitoring and early warning levels of resource and environment carrying capacity in Nanjing city were divided into five levels: red early warning zone, orange early warning zone, yellow early warning zone, blue early warning zone and green no early warning zone. The results show that the current early warning level of resource and environmental carrying capacity in Nanjing city is generally at a high level. Although the environmental coercive pressure of social and economic development in Nanjing city is relatively small and has a slowing trend, the overload status of resource and environment carrying capacity determines the main urban area as a red early warning zone. Jiangning, Liuhe and Pukou districts are orange early warning zones and Lishui and Gaochun Districts are yellow early warning zones. There is no blue early warning zone and green no early warning zone in the city.