Abstract: This paper discusses characters of mineral components and mineralizing fluid of Zhenjiang gold deposits in Liaoning.It shows character of epithermal gold deposit that concludes features of gold-carrying mineral components,gold mineral species,fineness,occurrences,gold mineral shape and granularity.There ware 3 evolvement stages of ore-forming fluid by sulfur supersaturated,sulfur saturated,and sulfur unsaturated supersaturated periods.In generally,it was rich in sulfur,iron,silicon and oxygen in oreforming fluid.The main gold-carrying mineral is pyrite and quartz.The gold is in the inclusion gold and crystal fissure gold residence in pyrite and quartz.