Based on field survey, petrographic, ore microscopic and SEM/EDS analyses of ores and altered wall rocks as well as petrographic, micro-thermometric, LRM and LA-ICP-MS analyses of fluid inclusions in quartz, this paper deals with the characteristics and origin of ore-forming fluid and the metallogenic process in the Tianjingshan gold deposit. The results show that gold mineralization occurs dominantly in quartz veins and subordinately in altered wall rocks and is related mainly to sericitization and Fe-bearing carbonization and subordinately to chloritization, pyritization, chalcopyritization, galenitization and sphaleritization. reveal high Pb, Zn, Cu, Bi, Mo and Sb in the fluid.