针对三维四向和五向编织复合材料进行了拉伸实验，从宏观角度研究了它们的力学行为，获得了这些材料的主要力学性能参数及变形、破坏规律。基于宏观实验，本文还对拉伸试件断口进行了扫描电镜测试，从细观角度对编织复合材料的破坏机制作了分析，得到一些重要结论。这些结果为进一步研究编织复合材料的强度失效问题奠定了实验基础 Tensile tests were carried out on the three-dimensional four-directional and five-directional braided composites. Their mechanical behaviors were studied macroscopically. The main mechanical properties and deformation and failure rules of these materials were obtained. Based on the macroscopic experiment, the fracture of the tensile specimen was also examined by scanning electron microscopy. The failure mechanism of braided composites was analyzed from the microscopic point of view, and some important conclusions were obtained. These results lay the foundation for further research on the strength failure of braided composites