Abstract: As Daliuhang Gold Mine goes into deep mining,the mining method changes with it into the upward horizontal dry filling,which,however,turns out not very effective in production capacity and makes ground pressure a serious safety problem.The paper by means of numerical simulation established 3D numerical calculation model according to ore body occurrence state.Based on orthogonal experiment principle,9 tests were selected.The simulation results are evaluated by allowable displacement criteria and stress criteria.The simulation test results show that the stope pressure and displacement are far better for No.1 and 7 tests than others.From the perspective of safety and ore room productivity improvement,Test 7 is determined as the optimal stope structure parameter,that is ore room length 60 m,level height 40 m and sill pillar height 4 m.