Abstract: In order to analyze the influences of the soil nailing parameters on the stability of the slope, a slope model with an angle of 60° was established for indoor geotechnical testing. A series of experiments were carried out to analyze how the patterns of the settlement of the slope top and slope landslide were affected by four factors including the length, the angle, the number and the positions of the soil nailing. The simulation with analysis results shows that the stability of the slope increases with the increasing soil nailing length when the soil nailing is placed in the middle of the slope, but the length of the soil nailing has less influences on the stability of the slope whether the soil nailing is placed at the top or the foot of the slope. The slope stability increases firstly and then decreases with the increase of the angle of the soil nailing, and the slope stability achieves its best view when the angle of the soil nailing is 50°. With the number of the soil nailing decreases, the slope stability would drop obviously. The positions of the soil nailing on the slope have a significant influence on the support effect of the soil nailing. When the soil nailing is in the middle position of the slope, the ultimate bearing capacity of the soil nailing attains its largest, and the slope settlement is linearly proportional to the load, and the distortion of the slope appears to be "progressively" damaged. From calculation and analysis it is found that when the soil nail is located in the slope, the safety factor of the slope is the largest. Comparing the experiments with numerical simulation results, it is proved that the soil nailing placed at the middle of the slope has the greatest influences on the slope stability.