Abstract: In order to study the support pressure distribution characteristics of steeply inclined coal seam, the 3DEC software is used to study many aspects in the process of fully mechanized caving mining, such as the planar distribution, trend, influence area, peaks and locations of support pressure. The results show that the dynamic pressure area of support pressure presents arc-shaped distribution characteristics in steeply inclined fully mechanized caving face, while the stable pressure area is rectangle-shaped. The peak of advanced support pressure in the upper of working face is higher than lower area and far away from coal wall, it has asymmetric characteristics. Compared with the inclined coal seam, the influence range of side support pressure is larger in the inclination of dynamic pressure area and stable pressure area for steeply inclined coal seam. The results are verified by site measurement, and the targeted prevention and control method of rock burst is proposed.