Abstract: Located on the southeastern flank of the Xianshuihe fault,the Moxi fault constitutes the boundary between the Songpan-Garze geosynclinal fold system and Yangtze landmass in the north,and between the western Yangtze platform fold zone and Xikang-Yunnan axis in the south.In the light of the structural deformation,geometry and kinematics,striation and microscopic quartz C-axis petrofabrics of the mylonite in the Mozigou,Wandong and Lashugang sections,the Moxi fault has spanned five phases of intense faulting,including the normal faulting in the early stage(Jinningian),ductile thrusting resulting in the formation of mylonite in the middle stage(Indosinian),ductile thrusting once again in the later stage during the Miocene,brittle sinistral thrusting and brittle sinistral thrusting-translation(Himalayan).