Abstract: In view of the problems in roof collapse, coal wall spalling and support crushing caused by the superposition of inclined crossing coal pillars in the upper multi-layer goaf in the working face of the close coal seam group, this paper takes 9309 working face of Shaping Mine as the engineering background, and based on the laboratory testing of the basic mechanical parameters of coal and rock mass, numerical simulation and theoretical analysis are used to study the distribution characteristics of working face stress field under the influence of oblique superimposed coal pillar. The results show that 9309 working face under the superimposed coal pillar is in a high concentrated stress state before mining, and the concentration coefficient is 2.3. Under the influence of coal pillar, the distance of maximum advance supporting stress in front of working face decreases gradually with the increase of advance distance. When the working face is under the coal pillar, the concentrated stress of the coal pillar gradually decreases and shifts due to the influence of mining, but it gradually increases in the range of about 12 m in front of the working face. When the stoping is stable, the influence range of the working face roof by superimposed coal pillar is 72% of the working face length, the stress of the superimposed coal pillar area is generally about 25 MPa, and the concentration coefficient is about 6.0. The larger the size of the remaining coal pillar, the farther the concentrated stress propagates in the floor, the wider the influence range, and the greater the concentrated stress in the roof of the working face.