Formabilities and mechanical properties of resinless bamboo fiber green composites were experimentally investigated by changing molding conditions; temperature and pressure. The green composites composed of only bamboo fibers which obtained from a steam explosion method were fabricated by a hot-press method. The molding temperature has a much greater effect on the mechanical properties such as tensile property and bending property. Molding pressure has an insignificant effect on tensile and bending strength of green composites. Fracture elongation of the composites tends to decrease with rise of temperature above 140℃ due to the decreasing of the strength of single fiber bundle during hot-pressing.