In order to study the feasibility of geothermal water re-injection and the appropriate recharge mode，the paper took geothermal pressure re-inject experiments in Shaanxi Hotel for examples.The result showed that pressure re-injection of single well is feasible in Xi'an suburb . Through the analysis of the change of re-injection capacity before and after artificial pressure, it analyzed the relationship between pressure and re-injection volume and the connection between re-injection volume and water yield,and analyzed the plug mechanism in the process of re-injection s. The results showed that the pressure re-injection can effectively improve the re-injection ability and increase the re-injection volume.