Abstract: Mine slope disasters always occurred in recent years.Due to the complexity of the mine landslide disaster,it is difficult to make effective monitoring and research.To safely and effectively monitor the safety status of the mine slope,three parameters of slope are measured by the advanced three-dimensional laser scanning technology,including the earthwork based on triangular mesh,the slope gradient based the point cloud data,and contour distribution based on mesh grid.Then the state of the slope is respectively analyzed from the three aspects above.It is one-sided to determine the state of the slope based on a single measurement parameter.To overcome the one-sidedness,a fuzzy comprehensive evaluation method is proposed,based on the three measured parameters.In this method,the factors of earthwork,slope gradient and contour distribution are set as evaluation factors,and the membership of each factor are determined based on three factors share in the proportion of all factors.Based on this,the slope state is evaluated by using the formula proposed.Therefore,slope deformation trends can be more comprehensively determined by this method.The method plays an important role in warning the slope disaster. 3D laser scanner,Point cloud,Slope,Earthwork,Slope gradient,Contour