Jinjiazhuang Ag polymetallic deposit is an important part of the East Qinling orogenic belt polymetallic deposits. This paper analyzes geochemical characteristics of magmatic rocks, and elaborates on the relationship between magmatic rock and mineralization. The authors believe that Jinjiazhuang deposit is a structure altered deposit, and the magmatic rocks provides heat and material basis for mineralization of the deposit. Mines such as Cu, Pb, Zn, W, Sn, Au and Ag have an associated relationship, which is fairly favorable for prospection of polymetallic deposits.