In the process of the development of geothermal resources，the geothermal tail water must be recharged in order to realize sustainable utilization of geothermal resources in sandstone reservoirs of sedimentary basin and keep heat reservoir pressure constant. But unreasonable mining and filling well pattern is easy to cause increase in pressure of recharging wells and decrease in the temperature of water collecting wells. A well pattern evaluation method for geothermal resources recycling was established using numerical simulation technology aiming at the key problem that restricting recharge. Geothermal fluid migration and heat transfer were simulated numerically based on generalized geothermal geological model and the software Petrosim-Tough2 was used to conduct coupled simulation of seepage field and temperature field. And then according to the determined optimal water output of single well，for different number ratios of mining well and filling well and distance between mining well and filling well，the mode of optimal well pattern was established to avoid heat breakthrough through economic evaluation and analog calculation. This method is used to effectively solve problems caused by unreasonable well network pattern of mining well and filling well during geothermal resources development in sedimentary basins，which include the thermal breakthrough and the high recharge pressure and can result in engineering and technical problems leading to high cost. This paper provides good technical support for the realization of the geothermal tail water recharge in sedimentary basins and green sustainable utilization of the geothermal resources.