The water levels in deep wells of YU01, YU11 and LU27 have continued to decline almost at the same time since 2006, and the decreases range from 3m to 12m. The three wells are located in the border area of Shandong and Henan. The investigation reveals that there are some pumping wells for geothermal mining, and the mining is gradually increased. We also find that the observation layer of wells with water level decreasing is the same aquifer layer which is pumping now, and the heat reservoir belongs to Ordovician. According to the hydrogeologieal tectonic characteristics of the area nearby Liaocheng-Lankao fault, we set up a three dimensional groundwater flow model based on the surrounding geothermal data and related aquifer parameters. Water landing funnel caused by geothermal mining was calculated using finite difference method, and the distribution characteristic of drawdown was analyzed. The result shows that the decline of water level was related to the pumping for geothermal mining. In areas nearby Liaocheng-Lankao fault zone, geothermal mining, which has increased year by year since 1995, has a good corresponding relationship to the decline of water level in deep wells.