A　linear　transformed　stress　space　method　is　proposed.　The　generalized　nonlinear　strength　theory　(GNST)　is　transformed　into　Mohr-Coulomb　criterion　in　the　new　proposed　stress　space.　Thus,　the　GNST　can　be　regarded　as　Mohr-Coulomb　criterion　in　new　stress　space.　The　strengths　and　stress-strain　experimental　results　of　two　kinds　of　clay　are　collected　and　analyzed　in　the　new　linear　transformed　stress　space.　The　consistency　between　the　experimental　results　and　the　theoretical　predictions　shows　that　the　transformed　stress　space　method　is　effective.