Objectives：The Taowan Group linearly distributes on the north side of the Luonan— Luanchuan fault zone and with quite different deformation characteristics and attitude of rocks in the east and west sections. Three structural profiles in Lushi area in the central the Taowan Group are choose as research objects, the deformation characteristics and why the attitude changes in different sections are studied. Methods：The detailed observation of structural profiles, measurement of foliation and lineation of mylonite, microstructure, paleotectonic stress field and geochronology analysis are used to study the Taowan Group. Results：The results show that the deformation mechanism of carbonate mylonite of the Taowan Group is a subgrain rotation type to high temperature boundary migration dynamic recrystallization. The kinematic characteristics of the shear zone are characterized by northward subduction and sinistral strike slip. The ductile deformation characteristics are consistent with the Luonan—Luanchuan fault zone in south side, and it is characterized by strong deformation near the fault zone and weak deformation far away from the fault zone. There are two groups of stress field directions, NE—SW direction and NW—SE direction. The NE—SW compressional stress may produced by subduction of the Kuanping group. However, the NW—SE stress may due to the influence of the Pacific plate. The geochronology indicates that the upper limit of ductile deformation is 386Ma. Conclusions：Carbonate mylonite of the Taowan Group is formed in a strong compression setting cuased by the Qinling microcontinental block oblique subduction to the North China plate. Its metamorphism and deformation is affected by activity of the Luonan—Luanchuan fault zone in Late Caledonian—Early Variscan, and is response to activity of the Luonan Luanchuan fault zone.