Abstract：Site experiment of rolling rock was designed in terms of the design theory of orthogonal test，of which 6 influential factors were considered including onset style of rolling rock，feature of overburden and vegetation，gradient of slope，length of slope，shape of rolling rock and mass of rolling rock. And these 6 influential factors were analyzed with the experiment by means of range，variance and regression analysis. During the analysis，the evaluation criteria were the acceleration of rolling rock movement and the restitution coefficient of collision velocity between rolling rock and slope surface. It is shown that among so many influential factors of acceleration，the gradient of slope is the most important one，followed by shape of rolling rock，feature of overburden and vegetation，length of slope，mass of rolling rock，onset style，in turn. The gradient of slope，the shape of rolling rock and feature of overburden and vegetation are critical factors for the movement velocity of rolling rock. The movement acceleration of rolling rock has a linear correlation with those above critical factors. Among 6 influential factors，only the feature of overburden and vegetation play an important role of controlling the restitution coefficient of rolling rock，which can be expressed by a linear relation. To the prevention of potential unstable rock mass，these experiment results provide proof to determine the impact energy. New feasible method is put forward for the whole treatment of potential unstable rock mass，which has a practical significance to the prevention of slope geohazard.
