With the promotion of large mining height working face, the intensity of large height hydraulic support under inclination related to the safe and efficient production of mining enterprises was analyzed. ZY13000/26/55 large mining height support was taken as example，the intensity was analyzed by using finite element analysis software Workbench under different inclination, and the force and displacement deformation figure of entirety and each part were got. The result showed that when the inclination under 10 °, the strength of the support could ensure the safety, but when more than 10 °,the new support structure and materials needed to be designed. The conclusion had some practical significance to promote the application of the large mining height hydraulic support under different inclination.