Abstract: Numerical simulation is used to study the transmission and distribution laws of lateral stress in floor seam and its impact on stress distribution of lower seams, and the lateral stress formed in upper coal seam of Huayuan Coal Industry 9^# and 10^# close distance coal seams, the results show that it should be arranged in the horizontal distance from the upper coal seam lateral wall more than 25 m when the lower coal seam mining face gateway is inner crossing layout;when the lower coal seam mining face gateway is outward staggered arrangement, it should be arranged in horizontal distance from the upper coal seam lateral wall more than 15 m.