Abstract: This paper takes the upward mining of Shenguang Coal Mine as the research object.In order to solve the problem of insufficient safety basis for the upward mining, based on the strength theory of rock beam in material mechanics and the method of numerical simulation, the stress, load and stability of coal pillar of “continuous rock beam” in the process of upward mining are calculated.The results show that: in the process of upward mining, the shear force and bending moment of the “continuous rock beam” above the coal pillar are basically evenly distributed, but the maximum shear force and bending moment of No.2 and No.17 coal pillars at the boundary are 13.96q and 10.09q,which are 7.38 % and 16.09 % higher than the average value.At the same time, the load of the “continuous rock beam” is calculated, and the safety factors are 18.6 and 6.31 respectively based on the Bieniawsk strength calculation formula.Both are greater than 1,and its state remains stable.In this case, the stability of upward mining is an-alyzed.When the 5^-2 coal seam is mined, the maximum vertical stress in the center of the stope is 12.46 MPa and the vertical displacement is 17.3 mm due to the influence of the overlying strata load.After the 4^-3 coal seam is mined, although the vertical stress in the center of the stope is still larger, the vertical stress of the coal pillar and the roof of the goaf in the 5^-2 coal seam decreases from 12.46 MPa to 11.52 MPa, and the vertical displacement and the displacement in the 0～50 m and 450～500 m sections increase to 15.8 mm.At this time, the displacement law is concave, still meeting the needs of mine safety production.