Compressed-air explosion pretreatments were used to improve the permeability of rubber wood veneers.Dyeing effects of the rubber wood veneer samples before and after treatments were compared.Under different pressure and explosion times,surface characteristics and micro pore of the veneer samples were observed with electron microscopy and mercury intrusion porosimetry.The results showed that the pressure of the compressed-air explosion treatments had significant effect on dye-uptake and surface darkness of the rubber wood veneer samples.Under optimal pretreatment conditions e.g.0.4 MPa of air pressure for 4 times,the dye-uptake and surface darkness of the samples increased by 22.76% and 19.69%,respectively.The mercury intrusion porosimetry results showed that the porosity and average pore diameter of the samples increased significantly and the specific surface area was slightly enlarged after the pretreatment,which was useful for dyes to better penetrate into wood.