1． College of Earth Sciences，Jilin University，Changchun 130061，China; 2． China- Japan Union Hospital of Jilin University，Changchun 130033，China

Usual ductile shear zone has relatively high strain magnitude． However，for high- grade metamorphic rocks in Daqingshan area，the related strain is very low with weakly developed lineation． Significantly，the fi- nite strain type with a K- value slightly lower than 1 and is characterized by compressional strain． Because the special tectonic environment with high temperature，the percentage of melt is relatively higher，which leads to a series of microscopic phenomenon such as multi- grain quartz bands，feldspar three edges equilibrium- like tex- ture，granular flow，etc． As a consequence，the tectonites in the studied area illustrate a unique character: ob- vious rheological meso- deformation structure but with very weak intracrystalline micro- deformation．