Abstract: Based on actual geological and mining conditions in the study area,by means of FLAC^3Dnumerical simulation software,this paper establishes the three dimensional numerical model of stress field and overlying strata movement laws during coal seam mining,so that it can simulate the strata behavior laws on mining 1242(3) working face under the mining influence of 1232(3) and 1242(1) working face,which provides a theoretical basis for safety production at 1242(3) working face.