Abstract: 　 Ethylated wood powder/polystyrene plastic composites (WPC) was obtained by compounding ethylated wood powder with polystyrene, then dyeing was carried with disperse dyes under high temperature and high pressure, its color shade, color, washing fade rate and the percentage of the dye were tested after that. Dyeing properties was carried out by infrared spectroscopy (IR) and scanning electron microscopy analysis (SEM). The results show that disperse dyes can be used for the dyeing of WPC, the color shade of dyed WPC was closed to that of dyed polyester fabric. The dyeing rate and washing fastness of the dyed WPC was related to the kinds of disperse dyes, dyeing temperature and dye concentration,et al. When the ethylated wood powder compound with polystyrene, transition pores in the ethylated wood powder were filled with polystyrene, then dyeing with disperse dyes, the surface of WPC become more smooth, which was conducived to the reflection of light and made the dyed WPC more brighter.