Water resources is one of the important factors that restrict the development of social economy, and this paper takes Linhai City of Zhejiang Province as the research area, to analyze the dynamic changes of the urban water resources carrying capacity and the main driving factors. Based on the analysis of the urban water resources carrying capacity complex system, fuzzy evaluation method and entropy value method were used to evaluate the urban water resources carrying capacity from 2010 to 2015, and the driving factors on the dynamic change of water resources carrying capacity in Linhai city were further analyzed by single factor sensitivity analysis method and scenario analysis method. The results showed that in recent years, the level of water resources carrying capacity in Linhai City has been fluctuating and rising, and the social-economic development is the main driving source. The urbanization rate, the tertiary industry share of GDP , industrial water reuse rate are the main driving factors, and the driving influence of the tertiary industry on the proportion of GDP is more prominent. This study provides decision reference for the sustainable utilization of urban water resources in Linhai City.