Fushui gold deposit is hosted in the Ordovician impure carbonate rocks with its mineralization jointly controlled by EW striking and NW striking faults. The fracture zone has undergone silicification and hydrothermal alteration. Disseminated gold are invisible by naked eyes or under optical microscope. This paper, based on a comparison between Fushui gold deposit and major ones alien, discusses the genesis from gold occurrence, isotope and geological features.