Abstract：The Hetai goldfield with gold deposits strictly hosted by mylonite zones are considered to be a typical gold mineralization example related to ductile-shear deformation and have the largest gold reserves in Guangdong Province. However, the shear deformation conditions versus the gold mineralization remain unclear. The Gaocun and the Yunxi gold deposit confined to ML11 and ML9 mylonite zone respectively are the significant gold producers in the goldfield. The magnetic petrology and anisotropy of magnetism susceptibility (AMS) of the barren and auriferous mylonite in the shear zones were studied after the macroscopic deformation and petrography characteristic observation. The x-T curves of mylonite show the Curie temperature of pyrrhotite, in combination of the hysteresis loops, isothermal remanent magnetism (IRM) and petrography characteristics, indicating biotite and pyrrhotite are the dominated magnetic bearing minerals of the mylonite with no magnetite, the contribution of pyrrhotite much larger than the biotite in Hetai goldfield. Therefore, the AMS characteristics are effective to show the deformation of the shear zones. The barren mylonite in ML11 mylonite belt (Gaocun deposit) have the similar mean magnetism susceptibility value Km (＜500 μSI), corrected anisotropy degree Pj, ellipsoid shape factor T, magnetism foliation F and lineation L with the ML9 mylonite belt (Yunxi deposit). Moreover, both the shear zones show consistent orientation of principle stress, nearly horizontal NNW-SSE striking maximum principle stress σ1 (K3) and steep dip NEE-SWW striking minimum principle stress σ3 (K1). Kinematic vorticity of two shear zones are also undistinguishable, varying from 0.12 to 0.63, less than 0.71. These characteristics suggest that both the shear zones in the Hetai goldfield subjected to Indosinian NNW-SSE trending severe compression which resulted in the mylonite as the S and SL tectonites with intense oblate stain ellipsoid, and the pure shear is dominated in the shear deformation. However, the AMS characteristics of auriferous mylonite is distinct from the barren mylonite, with the Km and Pj value of the former larger than that of the later, suggesting that the mylonite deformation strength tend to have positive correlation with the gold mineralization. Consequently, In the shear zone, the stronger the ductile deformation and the steeper the dip angle of the maximum strain principal axes (magnetic lineation) of mylonite, the more favorable it is for brittle fracture and gold enrichment in the later stage.