Abstract:In the study of distribution process of depositional basin of geothermal resource, geothermal gradient determines the distribution of geothermal resource, rather than study the distribution of the heat flow, but in the process of research geothermal gradient, the comparison about different depth calculated temperature gradient often put on the same plane, so it will result the wrong instruction in actual research , geothermal gradient and calculating the depth of the hole section is closely related to the underground situation, the different depth of geothermal gradient rules on a change to the same depth in the discussion, the paper put forward a solution, namely the uniform geothermal gradient .