Abstract: The hydrogeological conceptual model is constructed according to the hydrogeological conditions of Taiping-Zhongcang emergency water source in Tongling City. On this basis, the numerical simulation model of groundwater flow is established by 3D visualization software GMS, and then identified and verified. The simulation period is an emergency water supply cycle of 180 days (Jan. through Jun., 2017) with confined groundwater as the mining layer. The results show that the allowable exploitation of water source is 11.94×10⁴ m³/d, which reaches large scale (5×10⁴-15×10⁴ m³/d), under the condition of uniform distribution of wells, with mining well level drawdown not exceeding the roof of confined aquifer. Under the condition of emergency exploitation, the lateral seepage supply of Yangtze River is stimulated, accounting for 27.82% of the total water exploitation amount. The simulation data is also used for preliminary study of the conversion rules between ground and surface water.