<p>LN₂ fracturing enhances the pore structures of reservoirs, but it hardly reduces moisture that damages the reservoir gas permeability. In this study, the anthracite is thawed by microwave after LN₂ freezing. The evolution of pore structures and the variations of pore water and surface temperature are analyzed by nuclear magnetic resonance (NMR), scanning electron microscope (SEM), infrared thermal imager (ITI), and water imbibition tests. After LN₂ freezing, the seepage pores increase by 43.90%, and the gas permeability increases. The frozen sample is gradually thawed along height with the radiation time, forming a temperature gradient in the height direction and reducing the water content of samples. The seepage pores are further enhanced during microwave thawing, and the enhancement is positively related to the thawing duration. The results of NMR imaging and SEM further verified the pore structure development. As the temperature gradient, the moisture near sample bottom is first removed. The maximum temperature transfers from the bottom to the middle due to moisture/heat loss. The developed pore structures promote the samples to absorb water. Microwave radiation thawing not only removes moisture but also further enhances the pore structures. This enhances coal gas permeability. At last, a stimulating scheme of microwave thawing is proposed.</p>