Abstract: Resonance tests were conduced to measure the dynamic Young’s modulus(DYM) at different position of the culmin hight.The relationship of DYM,density and microfibre angles(MA) were analyzed.The results showed:the density and DYM increased with increase of node length of bamboo(NLB) but dynamic loss angle(DLA) decreased;MA showed negative correlation with NLB.DYM and DLA depends on MA,the smaller the MA is,the bigger the DYM is,and the smaller the DLA is.The density and MA are main factors which affect the DYM and DLA of different part of bamboo.