Abstract: In order to prevent the occurrence of water inrush and sand burst during coal mining in the upper group of Maiduoshan Coal Mine, drainage tests were carried out on the aquifer of Yan’an Formation between 1 and 2 coal seams through underground water drainage holes and hydro-geological observation holes, and the hydro-geological parameters were obtained, and the underground water flow field was simulated by software. The results show that the aquifer of Yan’an Formation receives direct recharge from the aquifer of lower Zhiluo Formation, that is, the two groups of the aquifer have close hydraulic connection. There is no abnormal area of high water level that cannot be lowered in the aquifer area, so the method of long-time drainage can be adopted to prevent water inrush and sand bursting from roof.