Abstract: In order to systematically study the influence of weft density on the bending properties of carbon fiber three-dimensional curved shallow-crossing linking woven composites, five specifications of carbon fiber shallow-crossing linking woven composites (warp density of 125 picks/10 cm, weft density of 120 picks/10 cm, 144 picks/10 cm, 180 picks/10 cm, 204 picks/10 cm, and 216 picks/10 cm, respectively) and carbon fiber plain woven composites were prepared using vacuum assisted resin transfer molding process(VARTM). The bending properties of the above materials were tested by universal material testing machine, and the failure mechanism of the materials was analyzed. The results show that, the warp bending strength of carbon fiber three-dimensional curved shallow-crossing linking woven composites decreases monotonically with the increase of weft density, and the weft bending strength increases first and then decreases with the increase of weft density. The bending failure morphology of low weft density carbon fiber three-dimensional curved shallow-crossing linking woven composites is dominated by delamination crack and fiber fracture, while the bending failure morphology of high weft density carbon fiber three-dimensional curved shallow-crossing linking woven composites is dominated by matrix shear failure. The bending strength of carbon fiber plain woven composites in both warp and weft directions is greater than that of carbon fiber three-dimensional curved shallow-crossing linking woven composites. The bending failure of carbon fiber plain woven composite is mainly caused by delamination and local fiber fracture, while carbon fiber three-dimensional curved shallow-crossing linking woven composite is mainly caused by interlayer shear.