根据已开发的多功能膨胀渗透仪，对高压实膨润土的渗透性再次进行测试，并结合前人资料，探讨了影响这种极低渗透性介质渗透系数测定的有关因素，指出对于渗透系数小于１０－１２ｍ／ｓ的高压实膨润土，其渗透性测试研究尚有大量理论与实验研究工作需做。 Based on the developed multi-functional infiltration tester, the permeability of high-pressure bentonite was tested again. Based on the previous data, the factors influencing the determination of permeability coefficient of the medium with very low permeability were discussed. It was pointed out that for the permeability coefficient less than 10-12m / s high-pressure bentonite, the permeability test there is still a large number of theoretical and experimental work to be done.