1:50000 geochemical survey has been completed in the northern part of Chongli District, Zhangjiakou City.The position of Xiaoxiwan intrusive rocks is highly consistent with the Xiaoxiwan composite anomaly (AS33) delineated by geochemical exploration. Utilizing regional data and large scale geological, geophysical and geochemical data obtained by anomaly verification, the authors made an integrated analysis of the ore-forming conditions of this district, and inferred the formation mechanism of mineralization alteration as well as the position of the mineralized altered body. Based on inferring mineralization mechanism and establishing model, the authors hold that the district possesses the potential in search for medium-high temperature hydrothermal polymetallic deposits. Suggestions are also put forward concerning the orientation of further exploration.