Based on eucalyptus powder (Wood, W) and waste polyethylene plastic bottles (PE), the preparation of wood powder/PE composite (WPE) and its performance are explored. The WPE was prepared by plastic injection molding machine, and the performance of WPE was studied through appearance analysis, tensile test, TGA spectrum, HalpinTsai model analysis and biodegradability. Eucalyptus powder can be well dispersed in the PE matrix. When the wood power mass is 3wt.%, the elasticity modulus and elongation at break of WPE are 1.69 GPa and 153% respectively. At this time, the temperature at which WPE decomposes by 5% (t5%) and the maximum decomposition rate temperature (tmax) increase by 5.13 ℃ and 2.73 ℃ respectively. After 320 days of soil burial, the maximum mass loss rate of WPE is 20.25%, which is much higher than the mass loss rate of PE of 2.35%, which fully shows that increasing wood powder can significantly improve the biodegradability of wood-plastic composites. The preparation of WPE can be successfully achieved by the injection molding method, and the preferred amount of wood powder is 3wt.%.