Abstract: The logging geothermal flux data and geothermal gradient data in the middle north region of Henan Province are collected and analyzed in this paper.Also geothermal flux data of sectional site in this region are transformed from depth of high conductive layer in the earth's crust from magnetotelluric sounding method making use of experience formula H_fcl=35Q^-1.3 given by A·A'da'm.Inhomogenous character in vertical and horizontal directions of geothermal field within studied area are obtained by comprehensive analysis and study of the geothermal field data mentioned above.It is inferred preliminarily that there may exist a geothermal stress region in the deep layer within the studied area.In addition,the relationship between geothermal field character and its geological structure background and deep environment in the area are analyzed and studied preliminarily in this paper.