Objectives: Xianyang is considered to be one of the most important geothermal fields in Guanzhong Basin. With the increasing exploitation of geothermal water year by year, it is one of the primary conditions for geothermal resource development to find out the origin of geothermal water. The Xianyang geothermal field is located in the hinterland of the Guanzhong Basin, spanning two different basement tectonic and lithologic units. The north-south boundary is the Weibei fault. Therefore, the recharge sources and geothermal conditions may show different characteristics on both sides of the Weibei fault. This paper will further study the fluid genesis of Xianyang geothermal field. Methods: We apply the analysis methods of hydrochemical characteristics, specific ion content ratios and hydrogen oxygen stable isotope characteristics of the geothermal water in Xianyang field to determine the recharge source and evolution characteristics of the geothermal water, and also apply the analysis method of noble gas isotope ratio to determine the origin of the geothermal gas. Results: The geothermal water chemistry types are mainly Cl-Na type, and the water on the north side of the Weibei fault are relatively more mature than the water on the south side. There is an obvious oxygen shift in the Xianyang geothermal water, the maximum oxygen shift could up to 10‰. The hydrochemical characteristics, hydrogen and oxygen stable isotope values of Xianyang geothermal water is similar to Xi'an geothermal water; the rNa/rCl of geothermal water in the study area are greater than 0. 85, the cation exchange index is between -0. 42 and 5. 93, and the desulfurization coefficient is greater than 1. The relationship between the noble gas isotope 3He/4He-4He/20Ne of dissolved gases in geothermal water located on the mixing line of the crust and air. Conclusions: Xianyang geothermal water was recharged from atmospheric precipitation in the Qinling Mountains, most of the geothermal water is orignated from atmospheric precipitation or surface water, and the possibility of mantle derived material is excluded.