Abstract: Rainfall is one of the key factors affecting slope stability, and conducting online slope monitoring is an important measure to ensure slope safety. This study employed an array displacement meter online displacement monitoring system to track the slip behavior of the Xiaoyingshan Slope at the Shilu Iron Mine. By constructing a wireless monitoring system, the slope deformation characteristics from September 5, 2023, to November 14, 2023, were analyzed. The impact of rainfall on the slip of the Xiaoyingshan Slope in the X, Y, and Z directions was further investigated. It is found that the cumulative displacement in the X direction is 463.59 mm, with an average displacement change rate of 6.53 mm/d. The cumulative displacement in the Y direction is 796.68 mm, with an average displacement change rate of 11.22 mm/d. The cumulative displacement in the Z direction is 143.58 mm, with an average displacement change rate of 2.02 mm/d. Throughout the entire monitoring period, the displacement change rate trend in the X and Y directions is consistent. Displacements change rates in the X and Y directions are significantly larger than those in the Z direction. Displacement in the Z direction exhibits minimal change and increased linearly. No mutations or significant anomalies are observed. Rainfall has a significant effect on slope slip. During heavy rainfall, the displacement change rate and displacement of the Xiaoyingshan Slope in the X and Y directions exhibit ''step-wise mutations''. The study reveals a quantitative correlation between displacement change rates and rainfall, providing reliable data support for conducting stability analysis of the Xiaoyingshan Slope at Shilu Iron Mine and proposing targeted mitigation measures.