Abstract: Inner Mongolia Autonomous Region is one of the largest resource provinces with three type rare mineral resources(rare resources, rare earth scattered resources) of China. It has the largest reserve of Niobium (Nb₂O₅) and rare earth among all the provincial-level administrative divisions. The northern margin metallogenic area of North China block is a typical rare colored multi metal metallogenic area, in which mineralization is closely related to well developed granitic magmatism of Early Yanshan period. The middle of the Inner Mongolia Autonomous Region is located in the middle section of the northern margin of the North China block, using the two granite rare metal deposits in lime kiln and Zhao Jing gou as the cases, A typical case study is taken as a method in order to clarify the characteristics of the "three dilute" typical deposits and control the factors related to the formation and distribution of the deposits, this paper studies factors such as metallogenic background, metallogenic characteristics and ore control, It is speculated that regional mineralization of rare metals may exist in the middle of the Inner Mongolia Autonomous Region.