Abstract: Gaoyangshan hot spring in Sanmenxia is located at the turning point of Fen-Wei Graben, with complex structure and concentrated stress. Lingbao-Sanmenxia deep fault is more than 1000 m apart and its influence depth is more than 3000 m. It forms a channel of geothermal rise and constitutes a convective geothermal system by fracture cycle. Near Wentang, there are many secondary faults in the rock mass, and the runoff conditions are good. Therefore, this is good condition for storing underground hot water. Because of Gaoyangshan fault uplift, Cenozoic and Quaternary aquifuges on the hanging wall, the hot water excretes to the surface as an overflow spring.