Abstract: The subject of this research is gas filtration in frozen rocks. For the first time, in laboratory conditions, it was possible to identify the processes that accompany gas filtration in frozen ground. Particular attention is paid to the study of deformations of primary cryogenic textures during filtration of gas under pressure. The features of the propagation of gas fluids in a frozen sample are analyzed. A comparative analysis of the cryogenic structure of frozen samples with and without gas supply has been carried out. The mechanism of pressure filtration of gas in frozen rocks is formulated. When studying frozen ground samples subjected to pressure gas, we used the methods of texture and structural studies in transmitted, reflected and polarized light. To identify changes occurring in frozen samples under pressure from gas, a comparative analysis method was used. At the same pressure, at low temperatures of the samples, filtration does not occur. Filtering begins when the temperature rises to -1 - -2 ºС. In nature, these relationships are determined by geological, landscape, and climatic conditions. For the first time, in laboratory conditions, with the help of structural studies, it was possible to identify the processes accompanying gas filtration in ice.