Abstract: The main mechanical properties of Ph. pubescens and Ph. Bambusoides with and without nodal were investigated. The results showed that static bending strength, compression strength parallel to grain, shear scrength parallel to grain, tensile strength parallel to grain and toughness in impact bending of the bamboo wood with nodal tend to reduce in a degree. Howerer cleavage strength and tensile strength perpendicular to grain increased obviously. The main factors affecting the mechanical properties of bamboo wood included the quanty of vascular bundle, the orientation of vascular hundles and the fiber strength in vascular bundles. The regularity as indicated above was important for the structure bionic of the composite materials.

Key words: Bamboo, Nodal bamboo wood, Mechanical properties, Vascular bundle