This paper took the water utilization efficiency of 15 Prefectures in Xinjiang from 2008 to 2015 as the research objects，and data envelopment analysis （DEA） and literature research method were used to establish the DEA-BC2 model to analyze thespatial and temporal variability of water resources utilization efficiency. The results show that： the water resources utilization efficiencyin all Prefectures of Xinjiang show an increasing trend during 2008-2015. Among them， the increase rate of water resourcesutilization efficiency is fastest in Kizilsu Kirgiz Autonomous Prefecture while the rate of it is slowest in Altay Prefecture. In addition，the spatial variability of water use efficiency is obvious. Water use efficiency rate is generally above 0.9 in the central areasof Xinjiang while it is below 0.7 in the southern region of Xinjiang.