Based on the study of geological characteristics and mineralization laws of No.1 gold vein in Jijiawa gold deposit,the ore-body shape,types of ore,mineral fabrics,mineral composition and the occurring states of gold in the gold vein are discussed,then the deep mineralization for this ore vein is predicated.The results show that the shape of the ore body is complicated,but is steady in thickness.The wall rocks of the ore vein underwent strong alteration,its mineralization has the feature of stepwise enrichment in vertical direction,and the foreground is good in depth of the ore body.