During construction of Meizhou-Kanshi Railway, the landslide defects occurred at side slopes of the deep cuttings several times. Based on the analysis on the main cause of the landslide, the paper proposes the new technical measures for strengthening the steep side slopes by adopting the prestressed anchor-cable technique. By applying the new measures, the desired aim of strengthening had been obtained, which has the role of anti-slip and protection of steep slopes.