Reinforced polyimide composite with of carbon fiber and carbon nanotube were prepared by hot molding technology. The mechanical and friction and wear behaviors of the reinforced composites were studied. Tensile tests showed that SCF and CNT exhibit a beneficial effect for restoring the stiffness of the CF/PI composite. The carbon fiber reinforcement was found effective in reducing the coefficient of friction and the wear rate. This implied that the CNT improves the adhesion between SCF and PI.