Abstract: To explore the grinding parameters′ effect on 20CrMnTi ground surface quality, the grinding experiments by using CBN wheel were conducted. The characteristic of ground surface Rockwell hardness H, surface residential stress σ_s, and subsurface residential stress σ_ss were discussed to reveal the grinding ability of 20 CrMnTi by using the single factor experiment. The results indicate that under the same condition, the H decrease with the increase of wheel speed v_s and grinding depth a_p, and increase with the increase of wheel feed rate v_w. The a_p has the greatest influence, followed by the v_w and v_s. The ground surface is equipped with the compressive residential stress. The compressive stress (absolute value) shows the increase with the increase of v_w and decrease of a_p. As the v_s increase, the σ_s fluctuated. With the increase of subsurface depth, the σ_ss changes from compressive stress to tensile stress and finally becomes close to 0. The σ_ss distribution looks better in lower v_s and shallower a_p. By using v_s=60 m/s, v_w=1.045 m/s, a_p=3 μm, the higher H and surface residential compressive stress, and better σ_ss distribution can be obtained, which shows better ground surface quality.