The　conventional　triaxial　tests　of　isotropically　consolidated　undrained　compression　shear　can　not　reflect　the　effects　of　anisotropic　stress　on　the　behavior　of　deformation　and　strength　for　natural　clays　which　are　often　met　in　engineering　practice.　To　solve　the　above　problem,　this　study　performed　a　series　of　GDS　(geotechnical　digital　systems)　consolidated　undrained　triaxial　compression　tests　on　natural　clays　subjected　to　the　effects　of　soil　structure　under　different　consolidated　conditions.　The　results　indicate　that　the　peak　values　of　stress-strain　curves　obtained　from　triaxial　anisortopically　consolidated　undrained　shear　tests　are　greater　than　those　responsible　for　isotropic　consolidation　under　the　same　mean　effective　consolidation　stress.　The　total　strength　envelope　obtained　by　triaxial　anisotropically　consolidated　undrained　shear　tests　lies　above　and　parallel　to　that　under　isotropic　condition,　and　the　cohesive　stress　of　total　strength　index　increases　due　to　the　existence　of　the　anisotropic　stress.　The　effective　stress　path　has　a　shape　similar　to　the　yielding　surface　when　the　consolidation　stress　reaches　the　order　of　the　consolidation　yield　stress　under　the　isotropic　consolidations,　and　the　effective　stress　path　reaches　the　peak　point　at　the　critical　state　line　and　then　slides　down　along　it.　The　anisotropic　stress　causes　the　deflection　of　the　effective　stress　path　to　the　right　with　respect　to　isotropic　consolidations.