Abstract: It is an effective approach of improving caving output in deeply inclined coal seam to increase the horizontal stage height, then how to control the caving technics of top coal becomes a key influence factor of caving ratio after the stage height is increased. The caving procedure in deeply inclined coal seam was simulated with DEM in this paper and the characteristics of subsequent and distant caving were compared emphatically under the condition of the same top coal height. Specific formula was put forward to confirm the caving turns and the results were practicable for actual engineering.