Abstract: Ganshu Gold Deposit is located in the famous Xiongershan ore concentration area.In recent years,a series of exploration and scientific research work has been carried out,and a major breakthrough in deep prospecting has been made.The discovery process of deep ore body is summarized:the theory of hydrothermal deposits genesis and the theoretical analysis of fluid mechanics→the cause analysis of shallow ore body morphology→deep ore body prediction→engineering verification.According to the analysis,when there are many mineralized alteration zones or veins in the fault zone,the prospecting potential of the mineralized alteration zone or vein in the fault zone is much greater than that of other veins; In the mine site,the alteration is stronger in the roof and floor of the fault zone in the ore-hosting part than the part without ores.The structurally enlarged part is easier to mineralize than the closed part.The mineral-bearing fluid migration and metallogenic model of the ore scale is established,providing scientific basis for regional deep prospecting.