Aiming at the problem of high backfill filling and horizontal deformation in the treatment and reinforcement of loess sliding high slope, a composite system of reinforced soil with limited backfill and anchor frame beam is proposed.At present, the anti-slide stability analysis is rarely studied. Based on a high-steep slope in Tongchuan, Shaanxi Province, this paper analyzes the the anti-slide effect of the combined system in the treatment of loess slump high slope by using finite element numerical calculation and on-site monitoring and testing, The results show that with the gradual application of the supporting structure, the displacement control of the slope is obvious, and the axial force change of the anchor cable has certain regularity. The axial force of the free section of the anchor cable is the largest, and the axial force variation curve of the anchorage section is concave, gradually becoming smaller toward the tail, and the end is close to zero.The anchor cable stress is sensitive to the internal deformation of the slope, and the displacement control of the anchor cable to the slope play a key role.The composite system of