Abstract: To solve the problem of loss of node information employing plane squeeze method if surface subsidence of FLAC^3D model is relatively large,the node numbering method is proposed for studying surface subsidence visible post-processing.The major steps of this method are to extract numbers of nodes before subsidence of the model,then extract displacements of nodes via these numbers after subsidence,and finally obtain subsidence data.The result demonstrates that node numbering method has a broader scope of application and a larger number of subsidence nodes are compared with plane squeeze method.