Abstract: Island mining working face has a relatively higher degree of stress concentration that lead to the difficulties of design of narrow coal pillar. The stress concentration of the surrounding rock of island mining workface in San Yuan Coal was analyzed. The mechanical model of main roof of the narrow coal pillar is established. The width of narrow coal pillar.was calculated. Based on the above results,the supporting schem was given and on-site verification was carried out.Results show that the design of narrow coal pillar and the support scheme were effectively in controlling the deformation of the roadway.