The Qiangsheng gold deposit belongs to quartz vein type． The fluid inclusions consist of four types: aqueous single-phase inclusions，aqueous two-phase inclusions，carbonated two-phase inclusions and carbonated three-phase inclusions． The fluid inclusions are characterized by low salinity ( 5%-9%NaCl eqv) ，low density ( 0． 66--0． 72 g /cm3 ) and medium temperature ( 210℃--250℃) ． The pressure of ore-forming is 60--95 MPa and the metallogenic depth is about 5． 49--7． 56 km． During the mineralizing process，ore-forming fluid underwent fluid unmixing in CO2-H2O-NaCl system． The stable isotope results indicate that the ore-forming fluids mainly generated from mantle，with the participation of a small amount of atmospheric water． Comprehensive studies have suggested that Qiangsheng gold deposit belongs to the type of mesothermal hydrotherm with mantlederived fluid participating in mineralization．