Abstract: The glass fiber, copper fiber, mineral fiber, Kevlar, potassium titanate whisker and vermiculite were used to prepare the multi-reinforced non-asbestos organic (NAO) automotive friction materials. The multi-reinforced materials have the various characters of micro and nano sized structures, one and two dimensions, inorganic and organic natures. The mechanical and friction properties of the automotive friction material were investigated to optimize the experimental condition. The reinforcing mechanism was discussed based on the environment scanning electron microscopy observation. The research results show that the multi-reinforced NAO automotive friction material under the optimized condition possesses higher impact strength (0.54J/cm2), better wear resistance (total wear：  1.35×10-7cm3/(N·m)) and friction stability (coefficient of variation：  5.86%), resulting from the mix and synergistic effect of various reinforced materials.