Abstract: The magnetic fabric is a susceptibility anisotropy of the rocks. Magnetic fabric analysis, as a method of geological researches, is widely u 10 study structure deformation. According to its features of thermal demagnetization and thermal homogenization, the author determined the chronogenesis relation of the mineralization and the deformation by means of comparative ana1ysis between the characteristics of the magnetic fabric and the deformation of the rocks. A negative correlation has been found between the gold abundance and susceptibility anisotropy (P) in the mineralized and unmineralized mylonite from Qifengcha altered mylonite type gold deposit, North Beijing, i.e. the higher the Au—abundance is, the lower the susceptibility anisotropy (P).The results of this s1udy suggest that the time of mineralization is later than that of deformation of the mylonite. This is important for the study of mineralizing mechanism of this type gold deposit. There is also a negative correlation between the content of Pb + Zn and the susceptibility anisotropy (P value) of the samples from the section of the ore, bearing structural gone in the Zongshuban vein Pb-Zn mega-deposit, south of Hunan, indicating that the deposit is formed by lateralization of ore-beaning hydrothermal solution and that the deformation is weaker after the mineralization. Meanwhile, the P values of the altered rock and ore-rock are higher (1.O441)than that of the granite-porphyry (1.0146), and the orientation of the minimum susceptibility axis of the altered rock and ore-rock(northeast)is different to that of the granite-porphyry(southeast). There also suggest that the period of the emplacement of granite-porphyry-veins with weak deformation is tater than that of mineralization, concordant to its genesis of magmatic hydrothermal deposit controlled by ear1y Yanshanian granite and the fault or fractures drawn from the data of gao1ogy, geochemistry and isotopic geochronology.