Abstract: The Shijiapuzi gold deposit, tectonically located in the north of Liao-Ji rift in the north margin of North China platform, is the type of altered rock of stratabound fracture zone superimposed and reformed by postmagmatic hydrothermal. The deposit was formed during early Yanshanian period.The metallogenic temperature ranges from 180 to 300℃.The ore-forming material is derived from strata, partly from magmatic rocks.The ore bodies are controlled by faults. The Sisotopic composition shows that it is derived mainly from plutonic syntectic magma, partly from strata.The O and C isotopic composition indicates that the ore-forming solusion is mainly magmatic water, mixed with a little metamorphic and meteoric water.