[Objective] Soil erosion is a major contributor to the loss of land resources, and hinders development of the agricultural production and construction of the ecological civilization. The purpose of this study is to explore impacts of slope gradient on amount and distance of splash erosion.[Method] Using splash collectors that can be adjusted towards eight directions separately, five troughs (packed with lou soil and set at a slope gradient of 0°, 5°, 10°, 15° and 20°, separately and a new model of needle spinkling device driven by a linear vibration motor, simulated rain-splash erosion experiments were carried out to explore relationships between slope gradient with amount and distance of splash erosion.[Results] (1) the amount of splash erosion on the slope of 0°, 5°, 10°, 15° and 20° was measured to be 0.486 g, 0.871 g, 1.235 g, 1.757 g and 3.570 g, respectively. It can be seen that a linear relationship between slope and amount of downward splash erosion was observed with y=0.1411x + 0.173 and R²=0.9983in the range of 0°~20°. The amount of downward splash erosion on the slope of 0°, 5°, 10°, 15° and 20° reached 0.632 g, 0.629 g, 0.621 g, 0.557 g and 0.588 g respectively. (2) The total amount of splash erosion on the slope of 0°, 5°, 10°, 15° and 20° was 3.815g, 3.902g, 4.106g, 4.889 g and 6.657 g, respectively, from which a binary function relationship was observed with y=0.0156 x²-0.21 x + 4.5815 and R²=0.9983 between total amount of dispersed splash erosion and slope. (3) the net sediment transportation volume of splash erosion on the slope of 0°, 5°, 10°, 15° and 20° was -0.148 g, 0.242 g, 0.614 g, 1.200g and 2.982 g, respectively. (4) the percentage of the splash erosion of first round on 0°, 5°, 10°, 15° and 20° slope was 46%, 34%, 33%, 30% and 29%, respectively, while the percentage of the splash erosion of the third round was 10%, 5%, 13%, 17% and 23%, respectively.[Conclusion] On the slope varying in the range of 0~20°, with rising slope gradient, the total amount of dispersed splash erosion, the net sediment carrying amount of splash erosion and the amount of downward splash erosion on the slope increases, while the amount of splash erosion decreases first and then increases. There is no significant relationship between splash erosion and slope gradient.