In view of actual conditions that AutoCAD is widely used in China's coal mines,a method to realize the visual prediction and analysis of mining subsidence based on CASS is given.Because CASS has been developed based on AutoCAD,the switchover of data format is not required in using the digital mine map of CAD format,and the input,output and edit of the digital mine map is very convenient.The prediction information of the surface movement and deformation can be represented in the digital mine map by means of the visualizing graph.