For studying the effect of the groundwater heat source wells working on the temperature field，the Comsol Multiphysics is used to build a three dimensional numerical model which couples thermal conduction and groundwater advection conductions. Some conclusions have been concluded by contrasting five different conditions that under different quantities of heat exchanged water put into the recharge well and a detail analysis of one. With the quantity of recharged heat exchanged water becoming larger, the influence radius expands and the heat surface between the two wells transfers more quickly to the pumping well. Temperature of the region close to the recharge areal increases obviously in early stage，while temperature of the region not so close to the recharge area ismore influenced in later stage. The temperature is closely relate to the seepage velocity and has nothing to do with position. Influence radius is almost proportional to seepage velocity.