By analyzing the data obtained from groundwater stratification tests， it was realized that the pressure of different reservoirs varies due to the influence of mud content， porosity， permeability and other factors， indicating the phenomenon of cross layer recharge between different aquifers in the same geothermal well. This paper analyzed the impact of factors such as cross layer supply， well flushing process， and drilling fluid invasion into the reservoir on reinjection， and proposed suggestions for implementing layered pumping reinjection， geothermal well drilling and completion， and fine technology on well formation.