This paper concentrate discussions on the relationship among the deposits in Baiyinchang copperpolymetallic orefield, metallogenic element zoning mechanism and identification of spilitekeratophyre. Based on the field investigation and previous research results, the authors consider that Huoyanshan and Zheyaoshan deposits were under the control of the same antiform, the former was situated in the south limb, the latter was located in the north limb, and its orebodies have been inverted. The deposits in Baiyinchang copperpolymetallic orefield were situated in different locations of the effusive mineralization system. Zheyaoshan and Huoyanshan deposits are near hydrothermal vent type deposit, and distributed in the caldera of the volcano dome center. Sifangshan, Sigequan and Xiaotieshan zincleadcopper deposits are far hydrothermal vent type deposit, and distributed in the slope depression of the volcano dome. Huangyakou leadzinc mineral occurrence distributed in the submarine depression, where is far away from the hydrothermal vent. During the process that Baiyinchang copperpolymetallic orefield was forming, seawater participated in percolation under high temperature conditions, so the normal volcanic rock turn into the spilitekeratophyre, usually its Na2O content greater than 3.5 percent. The spilitekeratophyre is an important prospecting criteria, we can use the Na2O-SiO2 diagram to distinguish the spilitekeratophyre from the normal volcanic rock. The more spilitekeratophyre, the better condition of mineralization. On the contrary, the less spilitekeratophyre, the more unfavorable condition of mineralization.