Accumulative deformation characteristics of red clay in southern Jiangxi, China, subjected to drained cyclic triaxial loading, were investigated at different cyclic stress ratios, confining pressures, and consolidation ratios. Results indicated that the accumulative strain of red clay showed a tendency, first, toward rapid accumulation, then slow growth, and finally, stability under different cyclic stress ratios, confining pressures, and consolidation ratios. After a certain number of cycles, the cumulative strain and cycle number under different initial consolidation stress levels and initial stress ratios showed a linear relationship, with the smaller the initial consolidation stress and initial stress ratio, the better the linear correlation. There was also an obvious linear relationship between the average cumulative strain rate and the number of cycles under different cyclic stress ratios. Based on the relationship, the cumulative deformation prediction model under long-term cyclic load was established for red clay in southern Jiangxi, and feasibility of the formula was verified by comparison.