The waste tire ground rubber was used as a modified material, to enhance the contaminants adsorption capacity of soil-bentonite backfill. Based on the consolidations tests of soil-bentonite modified with ground rubber, the effects of ground rubber and simulated leachate on consolidation and compression properties were studied. The soil-bentonite modified with ground rubber was medium to high compressibility soil. As ground rubber particles had different compressibility and hydrophobicity from clay particles, the compressibility and consolidation velocity of the samples increased slightly with the increase of rubber mixing content. For the sample modified with bigger ground rubber, the compressibility and consolidation velocity were lager. When the rubber mixing content is constant, simulated leachate would decrease the liquid limit, the combined water and the thickness of absorbed water, which would reduce the compressibility and increase the consolidation velocity of the sample.