A new type of three-dimensional braided carbon fiber composite was developed by optimizing the carbon fiber composite weaving process which employs carbon fiber yarn connecting the two adjacent carbon layers of left and right 45°two-way cross. The mechanical properties and failure mechanism of the three-dimensional braided carbon fiber composite were characterized by mechanical tests and SEM. The results show mat the flexural strength, compressive strength and interlaminar shear strength of the three-dimensional braided carbon fiber composite, which are as high as 750.67 MPa, 378.38 MPa and 425.6 MPa, increases by 10%, 88% and 120% compared with that of the one dimensional long fiber carbon fiber composite, respectively. The three-dimensional braided carbon fiber composite has been successfully applied to the development of the load bearing tools for live working of transmission lines, and the weights of the tools reduce more than 40% compared with the traditional tools. The successful development of this composite has laid the foundation for the preparation of light weight bearing tools for live working of transmission lines, which is of great significance to reduce the labor intensity and improve the working efficiency.
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