Abstract:Based on the study of the engineering characteristics of frozen soil, the mechanical parameters of cohesive soil under different moisture content conditions in room temperature and low temperature are analyzed. According to the influence of Permafrost on the foundation of substation buildings, three concrete engineering measures are put forward: setting gravel cushion, selecting independent foundation or pile foundation and reducing the frost shear force on the outside of foundation. The results of the analysis can provide reference value for the power engineering construction in permafrost regions.