Abstract: Abstract: In order to study the distribution characteristics and formation mechanism of Huaibei coalfield’s present geothermal field, this paper analyzes the earth temperature field character of the mines in different structural units of Lin-huan mine area. The results show that geothermal gradient is between 1.36℃?hm-1 and 3.77℃?hm-1 in the study area and the average geothermal gradient of different mines is between 2.05℃?hm-1 and 2.89℃?hm-1. The ground temperature is normal in study area, the fold uplift belt and dense faults area have higher geothermal gradient than other places. The distribution characteristics of present geothermal field in Lin-huan mine area is commanded by the structural morphology and fault development.

Key words: the distribution characteristics of present geothermal field, geothermal gradient, structural morphology, controlling factor