Crushing bamboo into mats through a special pair of rollers,has gained more interest for producing bamboo based composites.An experiment to determine the crushing influence and optimize the process was conducted in this study.The results showed that as the times of crushing was increased,the composite modulus of rupture,water-resistance and compression strength were improved;however,the tensile strength was decreased,the modulus of elasticity was not significantly affected.It was suggested that to make a composite with high water resistance,bending and compression strengths,the bamboo materials could be crushed for seven times;while high tensile strength was required for this bamboo-based composite,the bamboo materials should be crushed for three times.