Abstract: Changqing iron mine,hosted by Changshagou ultramafic rock,is located in the central and western of Altun tectonic belt and its distribution is also controlled by ultramafic rocks.Based on the rock constitution,structural deformation,distribution of mineralization alteration zone,the scale and distribution of Magnetite alteration zone,and the morphology,occurrence,spatial distribution and other characteristics of ore body have been analzed; and the quality of ore and features of surrounding rocks have also been studied in this paper.It is concluded that the Changqing iron deposit is at tached to a type of magma differentiation and has characteristics of the multi-stage transfor mation by the Altun fault; and then the main prospecting indications have been summarized; and,in conclusion,a new solution has been provided for prospecting the same type of iron ore in the region.