Abstract: The mining pressure of circular arc segment in the mining of deeply inclined thick coal seam fully mechanized coal face has significant localization and asymmetric features. Taking 37220-1 working face of Dongxia Coal Mine in Huating Mining Area of Gansu province as the research background, combined with the mining geological data as the background data, we firstly make use of FLAC^3D numerical model to monitor the stress changes of circular arc section near the working face. Result analysis shows that the whole stope space has the local characteristics of the ellipsoidal pressure arch shell structure; the surrounding rock stress is large and the vertical stress is in the peak in the joint of arc segment and straight segment of working face; the upper part is the free caving zone of rock mass, the surrounding rock is loose and the stress appears the minimum value, and local division was conducted to guide the practice of mine pressure control.