Abstract: On the basis of collecting and summarizing the temperature measurement data in Huainan Mining Area, we draw the distribution diagram of geothermal gradient, and analyze the present geothermal field characteristics, and also analyze the influence of groundwater on geothermal field from two aspects of interflow and cross flow. The study shows that the direction of hot space where geothermal gradient is greater than 3 ℃ / hm is along the axis of Chenqiao Panji anticline, and it is mainly controlled by the interflowing of hot limestone water. So the characteristic of ground temperature is higher in north lower in south, higher in east and lower in west; and the phenomenon that deep hot karst water and shallow cold water flows along tensile fractures leads to regional geothermal anomaly in Pan'er and Yangcun Mine.