Different degrees of ductile shear deformation have occurred from Devonian to Permian in Tian’e-Fengshan area, western Guangxi. On the edge of carbonate platform, especially along the specific lithohorizon from Carboniferous and Permian, a set of deformation belt of calcareous ductile shear formed, with features of low metamorphism, strong deformation and stratiform. The ductile shear deformation belts consist in strong, low and middle deformation belts. The deformation belt of the calcareous ductile shear shows the feature of thrust and concluded to form by the mechanism of arc-continent collision in late period of Middle Triassic in Tian’e-Fengshan area. The discovery may provide new evidence for the analysis of the formation and development of the Youjiang basin in western Guangxi.oft-com:office:office" />