Abstract: Composites of acetylated wood flour (AWF)/low-density polyethylene (LDPE) were prepared by extrusion-injection molding process, and cardanol acetate (CA) and epoxy cardanol acetate (ECA) were added respectively. Properties such as tensile strength and hydrophobic as well as surface energy, migration of plasticizers and thermal mechanical properties (TMA) were studied. The results showed that the tensile strength of composites decreased with the increasing content of plasticizers, but tensile strength of all composites with CA were higher than that of composites with ECA. Composites with 5% plasticizers showed similar hydrophobicity, but composites with 15% CA was more hydrophobic, and contact angle test showed the similar results. The migration test of plasticizers revealed ECA had lower transfer constant (4.35×10-4) than that of CA (5.48×10-4) at 85 ℃ in 100 min, and ECA retained more in the composites after 3 700 min. The result of TMA exhibited the inflation of composites intensified with increasing temperature, and composites with 15% ECA showed higher coefficient of linear expansion (3 758 μm/(m·℃)) than that of composites with CA (3 182 μm/(m·℃)).