Abstract: Reinjection is an effective way to solve a series of the problem of excessive exploitation of geothermal water，is also one of the most important means of geothermal development and management.On the basis of Xinxiang geothermal well reinjection test，this paper analyzes the feasibility of reinjection from the reinjection space，reinjection ability and exploitation quantity three aspects，and discusses the matters needing attention of geothermal reinjection，such as the reinjection time and reinjection water，reinjection area and reinjection mode.