Abstract: Triaxial compression tests are used to study the deformation and failure mechanism of tailings sand reinforced with geotextile under different layer.The results show there are same behavior of deformation and failure between tailings sand reinforced with one layer geotextile and single tailings sand.With the increase in layer number of geotextile, there are many sequentially reinforced sections born in the sample which are parallel to the plane of geotextile and control the development of shear deformation.The samples represent some higher bearing capacity after strength point. The influence come from sequentially reinforced section to the increase of reinforced soil has been discussed lastly.