The Daqingshan area in Inner Mongolia is a typical area of Early Paleoproterozoic orogenic belt in the North China Craton, in where a large number of high grade metamorphic-anatectic rocks are widely exposed, and it preserved abundant rheological structural patterns formed in the deeper level of continental crust. It therefore becomes a natural laboratory for the study of rheological behavior and mechanism of partially molten rock. This study carried out detail macroscopic-microscopic deformation, EBSD fabric analysis and zircon U-Pb chronology on the high-grade metamorphic-anatectic rocks from the Xuehaigou and Hujigou-Damiao belts in the Daqingshan area, and combining with the previous research data, we focus on the rock rheology with partial melting and its influence on the orogenic process. The results presented here suggest that the deformation patterns occurred in the deeper crustal level in the Xuehaigou belt and in the middle-deep level in the Damiao-Hujiigou belt in Daqingshan Paleoproterozoic orogenic belt. Under advanced metamorphic-anatectic conditions at the deep crustal level (e.g. Xuehaigou area), macroscopically, various forms of light. colored veins (melt) are involved in rheological deformation, usually showing a intermittent network-like zone formed by melt flow entraining mineral particles. Microscopically, single minerals, especially feldspars, are affected by diffusion creep, grain boundary slip and particle flow, instead of obvious deformation fabric. Therefore, there is no or very weak Crystallographic Preferred Orientation (CPO) development for the grains. In contrast, under relatively weak metamorphic-anatectic conditions in the middle-deep crustal level (e.g. Damiao-Hujiigou area), the melt content is relatively lower due to the weak anatexis, and some stripe or banded structures are formed macroscopically. Microscopically, minerals (e.g. plagioclase) usually suffer dislocation creep deformation and develop strong CPO. Significantly, the amphibole shows obvious dislocation creep characteristics at both in deep and middle-deep structural levels, and the CPO is slightly affected by the anatexis. The above deformation patterns and mechanisms reflect the characteristics of horizontal layered viscoplastic flow deformation of high grade metamorphic. anatectic rock in the solid-liquid two-phase medium at the root of the orogenic belt. Subsequently,the plastic flow deformation of the anatectic rocks gradually hardens following the exhumation process during the extension and thinning of the thickened orogenic crust.