Abstract:Heishashannan iron polymetallic deposit is located in the southern margin of the Qaidam basin. Because the surface is covered of aeolian sand, ordinary geological work is difficult to carry out in this area. Thus, magnetic work is an important way to find concealed metal orebodies. By using 2.5D magnetic method, anomalies circled in the survey have been interpretated and explained. It has guided the deep drilling verification and achieved good results.