The Zhaosugou fluorite deposit is a typical fluorite deposit in Longhua area. The deposit is located in the fault structure of volcanic rocks of Zhangjiakou Formation and early Cretaceous syenite porphyry. The occurrence of its orebody is strictly controlled by faults. Trace elements and rare earth elements in fluorite ores and surrounding rocks were systematically analyzed. Trace elements show that all samples have relatively high Co, Cr, Cu and Ni content, and the changes are stable, especially the Ni content is obviously higher. The values of U, Be and Mo are low and vary greatly. The distribution pattern of rare earth elements in fluorite ore shows a rightward light rare earth enrichment type, with both positive and negative Eu anomalies, and Ce shows a slight negative anomaly. The ore-forming inclusions are mainly liquid-rich inclusions and pure liquid inclusions. The temperature measurement of the inclusions shows that the complete homogenization temperatures are 137~238℃, and the homogenization temperatures are relatively concentrated, with an average of 189℃, the salinities are 0.88%~2.07% NaCl_eq, with an average of 1.61%, and densities are 0.63~0.89 g/cm³. Overall, the ore-forming fluid of the Zhaosugou fluorite deposit was a relatively uniform low temperature, low salinity and low density fluid. According to the metallogenic pressure, the metallogenic depth is estimated to be 0.289~0.538 km, with an average of 0.428 km. The geochemical characteristics of ore and surrounding rocks and the characteristics of ore-forming fluid inclusions show that the fluorite ore system was of low-temperature hydrothermal origin.