The visible difference of stitch-bonding process between China-made carbon fiber and TORAY carbon fiber has been made clear by way of fabricating its stitching fabric. Some parameters and measure methods has been chose to analysis quantitatively the influence on the hairness index of carbon fiber, including carbon fiber, yarn-guiding material, yarn-guiding structure and yarn-delivering mode. The results shows that hairness of carbon fiber is pivotal to stitch-bonding process. The paper attempts to give some references to evaluate and analysis quantitatively difference of carbon fiber stitch-bonding process, and to modify china-made carbon fiber.