The Abag Pb-Zn ore concentration area near the Sino-Mongolian border belongs to the Erenhot- Dong Ujimqin Banner copper-polymetallic ore belt. This paper sums up features of geology, physical geography and geochemistry in the study area and describes characteristics of this kind of ore deposits with two typical Pb-Zn deposits of Gaoerqi and Hadatetaolegai as examples. Some conclusions are reached from the angle of the spatial occurrence of the Pb-Zn ore body that this type of Pb-Zn deposits resulted from the joint action of the strata (Niqiuhe Formation) and structure location thinking in search for this kind of Pb-Zn deposits (faulted structure).