Tailings pond is a place for storing tailings or other industrial waste residues discharged from metal or nonmetal mines after ore separation. The tailings material will be discharged into the pond for stockpiling after sorting and processing. The tailings material is hard to consolidate under natural conditions as the result of high water content, resulting in a certain safety risk in the tailings pond. In this paper, a tailing soil in Huangshi City, Hubei Province is studied and triaxial consolidated drained shear tests of tailings materials under different cement contents and curing ages are carried out by using automatic triaxial apparatus. It is made clear that the stress-strain and volume deformation of solidified tailings soil are affected by cement content, curing age and confining pressure under shearing. The stress-strain curves manifest themselves as a strain hardening type at low cement content and they gradually change to a strain softening with the increase of cement content. The solidified tailings soil with high cement content has a peak of deviatoric stress at low confining pressure during shear process and shows the strain softening phenomenon which disappears as the confining pressure increases. In the test range, the solidified tailings soil shows volume shrinkage during shear process, and its stress and strain characteristics may be simulated by the NHRI double yield surface elastoplastic constitutive model.