The Ningjin buried uplift is rich in geothermal resources, and there are two geothermal wells with water temperatures exceeding 80 ℃, which have obvious geothermal anomalies. Identifying the genesis model of the heat source in this area is of great significance for geothermal exploration. Methods: In this study, gas geochemical methods were used to collect gas components and rare gas isotope samples for testing and analysis. The geochemical characteristics of geothermal gases and the origin of heat sources in the area were studied. Results: The results showed that the geothermal gas type in this area is N2 type, which is a geothermal resource type with deep circulation origin. This indicates that the geothermal resources in this area circulate and migrate in a relatively closed geological environment. The underground hot water mainly comes from atmospheric precipitation infiltration, and after heat conduction and convection heating, a low- temperature geothermal system is formed, which is less affected by mantle source heat; The volumn fraction of N2, O2, and CO2 components in geothermal gas stored in the area is not significantly correlated with well depth and water temperature, but mainly related to geological structural conditions, acidity and alkalinity of groundwater, and redox environment. Conclusions: The main heat sources in the region are the conduction of heat from the deep crust and upper mantle, and some deep faults connect karst thermal reservoirs. These faults play an important role in communicating and conducting magma heat sources from the deep crust and upper mantle, and form a good channel for underground heat flow. The sandstone thermal reservoir in the upper part of this area has a wide distribution range and good uniformity. The main source of heat is crustal; The karst heat controlled by faults has exposed fracture zones, connected underground heat source channels, and formed a high- temperature hot water type low- temperature geothermal resource system.