Abstract: During the safety monitoring of mine construction, the FLAC^3D is used to evaluate complex structures like large chamber and chamber group excavated in the project. However, it is less effective, more difficult and time consuming to build the 3D Mesh Model in terms of the more complicated modeling imitated by FLAC^3D. Therefore, based on the generation laws of element node within the software, we study the number of element node in two softwares and change their sequence to find out the documents identified by FLC^3D and turn into solid element and structural element. The results show that this three-dimensional modeling is feasible and makes the original time and effort consuming modeling ways more simple and fast with 70% time saved, which is greatly conducive to the safety monitoring of mine construction.