Abstract: In order to research the characteristics of the coal matrix compression (CMC) of tectonic coal at different deformation extents, the pressure-driven CMC of coal from Hancheng Coal Mine, Weibei Coalfield, was calculated by means of mercury intrusion method combined with gas adsorption (N₂ and CO₂) technique, and the effect of CMC on pore structure of tectonic coal was discussed. The results indicate that the CMC of coal is not necessarily increases with the increases of tectonic deformation. The variation of CMC may be the comprehensive results of factors including coal rank, micropore content and tectonic deformation. Coal compressibility has a significant effect on mercury pore volume when pressure is over 20 MPa. The mercury pore volume in the pore size range is from 6 to 100 nm after compressibility correction are higher than the results of N₂ adsorption due to the different testing principles followed by these two testing methods. Increasing tectonic deformation shows a trend to decrease the effect of CMC on mercury pore volume.