Abstract: Appling hand specimens, scanning electron microscope, low-temperature nitrogen and isothermal adsorption experiment methods, it studies the difference of physical properties of deformed coal reservoirs in Hancheng Block, including coal body structure, pore system, permeability capacity and absorption ability. The results indicate that tectonic movement can cause coal macro deformation and metamorphism, development of cataclastic coal, granulated coal, flack coal and mylonitic coal. It shows obvious features in the particle transportation and accumulation, shear deformation and corrugation of coal composition in the vision of microscopic to super-microscopic, and brittle rheology, brittle-ductile rheology and ductile rheology at micron level; with the intense of deformation, mesopore enlarges further, pore structure characteristics convert parallel into series, open-end pores changes to thin-neck-bottle-shaped pores gradually, percolation pore decrease, adsorption pore elevates and reservoirs permeability become poor. In the condition of geohydrologic element abundance, mineral substance fill stratification of weak deformation coal and cause permeability decline, while open tensile fractures transforming to close shear fractures, increasing the anisotropy of coal pore system and seepage characteristics; strong altered coal has larger surface area than weak altered coal, the difference can be 7.476 3 m²/g and the nitrogen adsorbance of nano-pore rise from 0.698 2 mL/g to 9.354 3 mL/g, its adsorption ability of CH₄ increases obviously.