Abstract s]The study is in the weathering and accelerat-aed aging of bagasse and bamboo particleboardnd their relationships,The results showedthat exposure condition of three-or five-year-weathering,DIN and BS of accelerated agingare almost the same; non-wood Chemical comp-onents and morphology of fibre,the kinds ofadhesive and weather conditions have the larg-est effect on the properties of particleboard;with duration time increasing,the range ofproperty loss decreases gradually.