Abstract: In order to mine roof and bottom pillars under filling body safely and improve the utilization of resources, the approach fill mining method with residual seam is put forward based on the mining environmental characteristics of the roof and bottom pillars.Mechanics theory and finite element theory are applied to analyze the variation of safety factor, stress, plastic deformation and tensile stress with the changes from the thickness of residual ore and width and height of the approach.The results show that the plastic deformation of filling body is little and distribution of deformation energy from the filling body is uniform when certain thickness of the pillars is remained at the top of the mining approach, because the energy from the upper load of the mining approach is absorbed and passed down evenly by the residual ore; the residual ores produce plastic deformation easily, which even appear transfixion when the thickness of the residual ore is small because a large number of energy is absorbed by the residual ores.The range of the maximum principal stress being out of ore-body's tensile strength is affected by the width of mining approach stronger as well as the value of top moderators stress.In summary, in order to maximize the economic benefits of the mine, the safe width and height of the mining approach is 2.5 meters and 2.6 meters based on the recommended thickness of the residual ores which is 0.9 meters, and the support of the mining approach's roof near the ore needed to strengthen to ensure the safety of the stope.