Based on 1:200 000 high-precision aeromagnetic survey in Weixi-Ninglang area along the central part of the Sanjiang region and a comparison with the magnetic anomaly characteristics of the known intermediate-acid intrusive bodies, the authors have found that quite a few magnetic anomalies are consistent with the known intermediate-acid intrusive bodies. In combination with physical characters and geological, gravity and geochemical data, tens of shallow or concealed intermediate-acid intrusive bodies were delineated. An analysis of the relationship between these rock bodies and known ore resources reveals the close relationship between the intermediate-acid intrusive bodies and Au, Ag, Cu, Pb, Zn polymetallic ore resources. It is thus concluded that these intrusive bodies serve as favorable areas in search for these ore resources.