Taking Changxing coal mine paste filling mining technology as the research object, by means of FLAC3D, simulated the strata deformation law under different fill scheme. The results show that the law of strata subsidence quantity under different fill rates overall consistency, but the maximum subsidence difference is bigger, when uses the filling rate is 70 %, variation law of overburden rock basic consistent with full pack. The work could provide certain reference for the similar research in the future.