Abstract: The designed width of the section coal pillars for the No.4 coal seam working face in Fengjiata Coal Mine tends to be conservative, and the existing method for determining the section pillar width does not fully consider issues such as economy, production organization, and efficient roadway support. In response to this, this paper employs methods including numerical simulation, theoretical analysis, and engineering tests to systematically analyze the influence of overlying coal seam mining on the roadway layout position and pillar stability in the lower seam, and proposes an optimization scheme for the section coal pillar width. The research shows that, under the premise of ensuring the stability of the roadway surrounding rock, the section coal pillar width for the No.4 coal seam working face can be optimized from 20 m to 11.25 m. In the field industrial test, the overall convergence of the roof, floor, and two ribs of the roadway during the mining of the 1409 working face was small, and the surrounding rock control effect was favorable. The test working face achieved direct economic benefits of 15.4945 million yuan. The test conclusions indicate that the optimization method of section coal pillar width proposed in this paper is of good safety and economic rationality under the conditions of shallow-buried close-distance coal seams.