Abstract: The Chifeng-Hulunbeier metallogenic belt is the part of Huanggangliang-Ganzhuermiao metallogenic belt in the south of Greater Xing'an Mountains.The geological structure of this area is complex，and crust and magmatic rock activities are intense，which has the potential to form polymetallic minerals in the South of Greater Khingan Mountains.In order to seek prospecting breakthroughs in the study area，and solve the problems of incomplete metallogenic prediction theory and model prediction of Chifeng-Hulunbuir metallogenic belt，a metallogenic prediction model of Chifeng-Hulunbuir metallogenic belt based on geographic information system technology and data weight theory is established.Firstly，the construction process of the prediction model is discussed.The spatial analysis software ArcGIS of the geographic information system is used to conduct spatial analysis on the obtained stratigraphic information，structural information and magmatic rock information in the study area，so as to construct a spatial database.Then，the weight of evidence theory is applied to the prediction model，the metallogenic prediction model of Chifeng-Hulunbuir metallogenic belt is established.Finally，based on the established model，metallogenic prediction work is done.According to the metallogenic potential，the study area is divided into three types target areas based on the evidence factors of the study area acquired by substituting the data from the spatial database into the prediction model.By verification，the metallogenic potential of the target areas are good，which indicated that the metallogenic prediction results is reliable.The established metallogenic prediction model has certain reference significance for conducting exploration and prospecting works in the Chifeng-Hulunbeier metallogenic belt in the future.

Key words: deep prospecting, weight of evidence model, GIS, geological characteristics, metallogenic prediction, prospecting target area