Tectonic gneiss is one of main tectonites in ductile deformation belt of deep tectonic levels of crust, which record a lots of important information for rock rheological  characteristics and being developed in Precambrian high grade metamorphic rocks. Tectonic gneiss is a dynamic tectonite, which is formed by strongly plastic rheology, metamorphism and partial melting. One of main factors which controlled and affected the formation of the tectonic gneiss is melt, main deformation mechanism are diffusion creep and grain flow, causing huge strain in deformed rocks, but no strain in single grain.