Researches of the Jiaodong gold cluster have always been the subjects of discussion among ore geologists, due to the huge reserve and production. Three ore fields distribute along Zhaoyuan—Laizhou fault belt, Qixia fault belt and Muping—Rushan fault belt. Jiaojia gold deposit situated in Zhaoyuan—Laizhou fault belt is typical of alteration rock type gold deposit, ore bodies of which lie in the crashed alteration belts of the Jiaojia main fault. The paper focused on the fluid inclusions of the main mineralizing stage, and came up with that types of fluid inclusions from main mineralizing stage include two or three phases H2O—CO2±CH4 type, two phases aqueous type and single or two phases CO2- rich type. Volum of carbonate phase between spatially tighly related inclusions diverse notability, but are approximate in the homogenization temperature. The homogenization temperatures，salinities and desinies of fluid inclusions from the main mineralization stage rang from 160 ℃ to 320 ℃, 4% to 10%NaCleq and 0.64 to 1.10 g/cm3, belonging to high—mediate temperature, mediate—low soilid, low desinity fluid. Laser laman testing of the fluid inclusions shows feimie resonace sprumme of typical of CO2, and CH4 typical sprumme are occasionally. Contrasting the characteristic of ore fluid, H—O, C and Sr—Nd isotope between Jiaojia and other gold deposit types from Jiaodong Peninsula，it is suggested that altered rock type and quartz vein type gold deposits are both products of the same tectonic—magma—fluid mineralization system insult fron the interaction between crust and mantle，which taken place under the western subduction of Asian Pacific regime during Early Cretaceous. Convertion of structural force field orientation，boiling of ore fluid and wide fluid—rock alteration are the ore forming mechanics of Jiaodong gold deposits.