Abstract: With the large-scale development of shallow coal seam resources in western China, the stability control of thin bedrock roof under gully terrain has become one of the key technical problems affecting the safe and efficient production of coal mines. Taking the mining roadway of 42211 working face in Liangshuijing Coal Mine of Shaanxi Energy as the engineering background, and optimize the support scheme for the thin bedrock roof support system of shallow coal seam under the geological conditions of the gully area. Through theoretical analysis and FLAC^3D numerical simulation method, the vertical displacement field and plastic zone distribution characteristics of roadway under different bedrock thickness conditions are compared and analyzed. The classification standard of thin bedrock roof with the weathering degree and integrity of bedrock within 4 m as the core is proposed, and the roof is divided into Class I (normal bedrock), Class II (weak weathering) and Class III (strong weathering). Based on the classification results, the original support scheme is optimized, the sub-regional support scheme is designed, and the grouting reinforcement and secondary support strategies are proposed for the broken roof area. The field application shows that the optimized support system significantly improves the roof stability and the overall support effect of the roadway.