Abstract: In order to better understand the fatigue behavior of 3D orthogonal woven composites (3DOWC) and improve the fatigue resistance behavior of material, the bending fatigue property under low cycle load was studied, which combined quasi-static three-point bending test and the cyclic bending test under 60% stress levels of 3DOWC with the ABAQUS finite element software that construct whole-scale 3D solid model. The distribution of stress, fatigue damage shape of the 3DOWC were obtained. It is found that the warp yarn is the most important load bearing part, the stress concentration area is in the middle of loading area, and damage occurs mainly in warp yarn that closes to Z-yarns channels.Triangle damage area is formed up and down gradually in the middle of loading area with increasing cycle load. This study may give guidance for future design and optimization of composites.