结合核磁共振仪，利用自行设计的机械加压装置，包括非金属材料制成的耐压试管，确定了冻土对应不同压力和温度的未冻水含量，并计算了相应压力下冻土的冻结温度．实验温度范围为０～－２０℃，压力范围为０～４０ＭＰａ．结果表明，冻结温度随压力增大而呈线性降低；对应不同温度的未冻水含量随压力的增大而增大． Combined with the nuclear magnetic resonance instrument, self-designed mechanical pressure device, including pressure test tube made of non-metallic material, was used to determine the unfrozen water content corresponding to different pressures and temperatures of frozen soil. The freezing of frozen soil under corresponding pressure temperature. The experimental temperature range is 0 ~ -20 ℃, the pressure range is 0 ~ 40MPa. The results show that the freezing temperature decreases linearly with increasing pressure, and the unfrozen water content corresponding to different temperatures increases with the increase of pressure.