Abstract: In this paper, the +470 m horizontal coal strata in Changcun Coal Mine, Lu'an Mining Area were selected as the simulation research object, and the 3D geological surface model was constructed based on Rhino precise surface modeling software.The original geo-stress field of Changcun Coal Mine was calculated and inversed by the finite difference numerical simulation software FLAC^3D. The results show that: using Rhino modeling software can more accurately build the geological model of the coal mine area, and using curved surface instead of rock strata can more truly reflect the actual distribution of underground strata in coal mine, folds and other geological structures can be truly reflected, and the numerical simulation inversion results of the original stress field are more accurate and reliable; there is a great difference between the in-situ stress field of the large geological structure region and that of other regions, from the middle of the fault to the end of the fault and then to the area far from the fault, the in-situ stress field presents a distribution rule of "small-large-original". By comparing the measured values of 17 in-situ stress measuring points in Changcun Coal Mine with the measured values of in-situ stress inversion, both show that the maximum principal stress of + 470 m in Changcun Coal Mine is stable at 12 MPa level, the minimum principal stress is stable at 6 MPa level, and the vertical principal stress is stable at 9 MPa level, which belongs to strike slip stress state.There is a high consistency between in-situ stress measurement and in-situ stress inversion.