The study examines the formation mechanism and dynamic process of the Xinjing landslide, which occurred at the Xinjing Open-Pit Coal Mine in Inner Mongolia on February 22, 2023. The landslide resulted in 53 fatalities, 6 injuries, and economic losses of up to 204.3 million RMB. The research uses remote sensing imagery, meteorological and seismic data, and geological and hydrological conditions to analyze the landslide. Key findings include: 1. **Dominant Causes**: Excavation activities and rear-end slag loading are the primary causes of the landslide. 2. **Disaster Formation Process**: The process involves excavation disturbance, over-mining deformation, and failure and sliding, characterized by the formation of artificial slopes and the deformation of high and steep slopes due to over-mining and coal stripping. 3. **Landslide Dynamics**: Seismic signal inversion reveals that the landslide has a volume of approximately \(6.88 \times 10^3\) m³, a main sliding process lasting 35 seconds with a maximum velocity of 13.7 m/s, and a horizontal displacement of 165 m. 4. **Geological Background**: The Xinjing Coal Mine is located in the southern region of the Helan Mountain, with complex stratigraphic formations and significant discontinuities. The mine has a concave configuration with a designed depth range of 40–180 m, and the deepest section is in the southern part, with bench heights ranging from 20 to 40 m. 5. **Slope Deformation**: The slope had a maximum vertical height of 315 m and a gradient of 39°, with the upper part consisting of three benches. Long-term mining led to the generation of cracks and rock fragmentation, further increasing the risk of slope failure. The study provides insights into the formation and process of the Xinjing landslide, enhancing the understanding of engineering prevention and control of high and steep slopes in open-pit mines.The study examines the formation mechanism and dynamic process of the Xinjing landslide, which occurred at the Xinjing Open-Pit Coal Mine in Inner Mongolia on February 22, 2023. The landslide resulted in 53 fatalities, 6 injuries, and economic losses of up to 204.3 million RMB. The research uses remote sensing imagery, meteorological and seismic data, and geological and hydrological conditions to analyze the landslide. Key findings include: 1. **Dominant Causes**: Excavation activities and rear-end slag loading are the primary causes of the landslide. 2. **Disaster Formation Process**: The process involves excavation disturbance, over-mining deformation, and failure and sliding, characterized by the formation of artificial slopes and the deformation of high and steep slopes due to over-mining and coal stripping. 3. **Landslide Dynamics**: Seismic signal inversion reveals that the landslide has a volume of approximately \(6.88 \times 10^3\) m³, a main sliding process lasting 35 seconds with a maximum velocity of 13.7 m/s, and a horizontal displacement of 165 m. 4. **Geological Background**: The Xinjing Coal Mine is located in the southern region of the Helan Mountain, with complex stratigraphic formations and significant discontinuities. The mine has a concave configuration with a designed depth range of 40–180 m, and the deepest section is in the southern part, with bench heights ranging from 20 to 40 m. 5. **Slope Deformation**: The slope had a maximum vertical height of 315 m and a gradient of 39°, with the upper part consisting of three benches. Long-term mining led to the generation of cracks and rock fragmentation, further increasing the risk of slope failure. The study provides insights into the formation and process of the Xinjing landslide, enhancing the understanding of engineering prevention and control of high and steep slopes in open-pit mines.