Based on evaluation and analysis of Copper Triazole（CuAz） preservative,which was commonly used in wood product preservation industry in China,the authors found that the CuAz preservative exhibited some poor performance in mold inhibition,termite resistance.Decay resistance performance of CuAz preservative was good,leachability of CuAz preservative was better than import preservative,and metal corrosion of CuAz preservative was low.