Abstract: The tensile strength of the soil is smaller than the shear and compressive strength. Mechanical properties of soil under tensile state is often ignored by people, but in dam core wall, tensile huge buildings, ground fissures and landslide trailing edge cracks caused by some geotechnical engineering problems, such as people on the tensile strength ability put forward higher requirements. This article is based on a series of transformation of conventional triaxial apparatus, made to the stele tableland landslide of undisturbed loess with different confining pressure and moisture content by consolidated undrained tests, to obtain tensile strength parameters. On the basis of experiment. Based on the experimental results, under different confining pressure and moisture content of the relationship between tensile stress and strain are analyzed, and the tensile strength as the confining pressure and moisture content change curve, tensile strength parameters, so as to optimize the loess slump material parameter selection of calculation model.