According to the current situation of water resources in Xi′an,11 indicators were selected from five levels of driving forces, ramely pressure, state, impact and response to construct the urban water resources vulnerability assessment system based on DPSIR model. The entropy weight method and fuzzy mathematics method were used to evaluate the water resources vulnerability of Xi′an in time and space dimensions, respectively. The results showed that the water resources vulnerability of Xi′an from 2007 to 2017 showed a downward trend and then an upward trend. It decreased significantly from 2007 to 2013, and rose from 2013 to 2017. Except for the non-vulnerable state in 2013, the other years are mild or moderate vulnerable. The water resources evaluation results in 2017 show that the water resources vulnerabilities of different regions is highly differentiated. In contrast, the urban water resources vulnerability is the highest, and Zhouzhi County is the lowest. Optimizing water resources allocation, improving water resources utilization rate and alleviating the contradiction between supply and demand are the key to reducing water resources vulnerability.