Abstract: The complex abutment pressure distribution of isolated island face greatly affects the surrounding rock stability of gob roadway. In order to explore the bearing characteristics of narrow coal pillar in gob excavation, the correlation between the plastic zone width of coal pillar and various factors is investigated by theoretical analysis method. The influence of supporting parameters on the stability of roadway surrounding rock is analyzed by numerical simulation method. The results show that the width of the plastic zone increases approximately linearly with the increase of the lateral pressure coefficient. With the increase of support strength, the width of plastic zone decreases approximately linearly. The increase of cohesion and friction Angle will lead to the decrease of the width of the plastic zone, but the amplitude of the decrease is gradually smaller. Increasing the length of bolt and the preload can enlarge the compression range and effectively control the deformation of roadway surrounding rock. In order to improve the construction efficiency and economy, the proper width should be selected to adjust the spacing of the interrow on the premise of ensuring the support strength. Through industrial experiments, the deformation of roadway surrounding rock tends to be stable after adopting reasonable width of coal pillar and supporting structure, which ensures the safety and normal use of roadway, and verifies the effectiveness of supporting scheme.