Abstract: A goat about 140 km² has been formed because of coal mining in Xuzhou urban planning area. The free space and roadway between rock masses, resulted from collapsing goaf, provides the place to store groundwater. According to preliminary evaluation, 75.83×10⁶ m³ of water was stored in the goaf of 14 coal mines. However, the effective use of mine water resources is relatively low. In this paper, according to the comprehensive analysis of construction conditions and operation safety of groundwater reservoir in Xuzhou urban planning area, including water storage, quality control and regulation condition, we study the feasibility of construction of groundwater reservoir in the goaf. Seven groundwater reservoirs with high availability are selected, of which Xinhe, Woniushan and Dahuangshan are Grade Ⅰ and Hanqiao, Pangzhuang, Quantai and Qingshanquan are Grade Ⅱ. This research may provide new water resource for emergency water supply in Xuzhou.