Based on an analysis of elements association characteristics and anomalous element assemblage and a discussion on the basic geology of Yanshiping area, the authors have obtained the following new evidence for ore-forming geological background: There are big scale intermediate basic volcanic rocks in Yanshiping area, and there are some intermediate — acid intrusive rocks or vein rocks. Yanshiping fracture and Wenquanbinzhan fracture are deep fractures with rock-guiding and rock-control characteristics; NW-trending Chuduo-Chaqiong fracture is also rock-guiding and rock-control structure, and the ore-forming role of anticline structure is better than that of synclinal structure. According to the above conclusions, the authors hold that the Yanshiping mineralization is closely connected with intermediate basic volcanic rock and intermediate — acid intrusive rocks, and mesothermal and epithermal deposits and iron-copper polymetallic ore deposits are regarded as belonging to volcanic type and sedimentary- reworked type.