Abstract: The effect of fibre arrangement direction on friction and wear properties of C/C composite was studied.The results of microstructure analysis and brake tests showed that for the 2D C/C composite,sometimes a single fibre and sometimes a bunch of fibres are surrounded by deposition carbon,the initial peak value of the brake moment and friction coeffident is smaller,but thewear rate is bigger; while for the 3D C/C composite,every single fibre is surrounded by the deposition carbon,the curve of moment of brake force is stable,the friction coefficient is bigger,but the wear rate is smaller.