The Xiaotian—Mozitan ductile shear zone overprinted on the North Dabie gneiss，which is subhorizontally sinistral on kinematics. The ultralmylonite, mylonite, protomylonite, deformed gneiss (schist), surrounding rocks crop out in sequence from the center to the periphery Generally. The deformed rock-forming minerals include quartz, feldspar, amphibole, mica and so on, which occur as the relative order of dynamic recrystallization: micaquartzfeldsparamphibole, according to the deformation microstructures. Finite-strain measurement and statistic of the GSPO indicate that different minerals present a similar variation trend in grain size, strain, and preferred orientation, but at the same time they have individual characteristic distinguished from each other. As the mylonitization strengthened, for different minerals, the average grain size diminished gradually, the finite strain increased, the acute angle between elongated axis and the X axis narrowed. The GSPO of all minerals at 90 degrees for a range of statistics show that, the long axes of deformed minerals are preferred at obtuse angle interval (along the shear direction); and it shows at the same time a directional symmetry if the statistical interval changed into 15 degrees for one range. Different minerals have their own characteristics in the above measurements: mica in different samples shown the largest strain followed by quartz, feldspar, and amphibole; with the tectonites changed, the most obvious variation trend on strain was mica, quartz followed, amphibole and feldspar are inconspicuous. The statistics also show that mica and amphibole have a smaller angle between the elongated axis and X axis than quartz and feldspar.The deformation of the minerals demonstrates that the mica, especially the mica fish fabric, is the most credible indicator to identify shear sense. Based on analysis and comparison of content and distribution in the shear zone, crystal structure, sensitivity on strain in different position in the shear zone, it is proposed that quartz is the best strain mineral to reflect the overall strain state of the shear zone.The above measured results indicate that there is an approximately consistent variation in different minerals as the deforming conditions changed gradually. In other words, each mineral in the deformed minerals can reveal the shear style, state of stress—strain and so on of the shear zone. Each deformed mineral also has its individual characteristic in above measurements which implie the crystal structure, grain shape, mechanical property, deformation behavior and so on of the mineral itself. So it is advisable to choose corresponding deformed minerals or their fabric aimed at different research aspect of the shear zone in order to get accurate results and reasonable interpretation