The natural durability of Radiata pine（Pinus radiata） wood as well as the decay resistance of heat-treated and water-based copper azole-treated Radiata pine wood were evaluated.The test results showed that natural durability of Radiata pine wood reached Grade Ⅲ（slight decay resistance）.The decay resistance of Radiata pine wood samples heat-treated at 215℃ for 3 hours was improved significantly to Grade I.The permeability of the Radiata pine wood was also assessed with the results showing a better permeability of the sapwood samples than the heartwood ones.To reach chemical retention value of 1.17 kg/m3,the sapwood could be easily treated in vacuum condition just for a short period of time,while the heartwood had to be treated in vacuum conditions and then soaked under normal pressure.When the sapwood samples were treated with CuAz-5 preservatives with 0.97 kg/m3 of the chemical retention value,the loss rate in laboratory test was less than 5.7%.When chemical retention value of 1.4 kg/m3,the sapwood samples performed equally well at both Year-1 and Year-8 field tests.