In this study, nine strains of forage grasses, including three Sorghum bicolor×Sorghum sudanense (SS_BJ, SS_JS, SS_HF), two S. sudanense (Piper) Stapf. (SU_JS, SU_HF), two Pennisetum americanum×P.purpureum (PP_JS, PP_HF), Lolium multiflorum Lam. (LM_JS) and Lolium perenne L. (LP_JS), were used as research material in pot experiment with 0 (CK), 10 (Cd10) and 20 mg/kg (Cd20) Cd stress treatments. The growth index, Cd content and enrichment index of different strains were measured. We investigated the Cd remediation capacity of different species and strains of forage grasses to establish an evaluation system for the phytoremediation capacity of Cd-contaminated soil, and to discover phytoremediation resources for Cd-contaminated soil that take into account enrichment and post-treatment. The results showed that: (1) Both of the plant height and biomass of all forage grasses at different degrees under Cd stress, among which SU_JS had a high tolerant to Cd stress under both Cd10 and Cd20 treatments. (2) Both LM_JS and LP_JS had higher above-ground and below-ground Cd contents under Cd10 and Cd20 treatments, and the three strains of S. bicolor×S. sudanense had greater differences both in Cd content and Cd accumulation. (3) Under the treatments of Cd10 and Cd20, the enrichment indexes of S. bicolor×S. sudanense and L. multiflorum Lam. performed well, and the enrichment indexes were different greatly among the S. bicolor×S. sudanense strains. (4) L. multiflorum Lam. could obtain the highest overall evaluation scores at two Cd treatments, and the next was S. bicolor×S. sudanense. This study showed that all of the tested forage grasses had a strong tolerance to Cd stress, but there were significant differences in tolerance and enrichment ability among the different strains, with the greatest difference among the S. bicolor×S. sudanense strains. The model developed in this study could be used as a reliable method for the selection of plant resources for the remediation of Cd contamination.