This article was based on researches and tests on the active copper components in ACQ wood preservatives,using EDTA complexometric titration as test method,as well as researches on wood samples based on atomic absorption spectrometry.

Liquefaction of spent ACQ-treated wood in phenol and copper removal.

Optimum conditions for synthesis of chitosan Metal complex(CMC) as new potential wood preservative;

Untidecay treatment of wood is introduced in this paper,and the principal of wood untidecay treatment,common wood preservatives and new untidecay method are presented separately.

Toxicity tests on termite,fungus and mammal were conducted on SGB borate concentrating solution wood preservative,the results showed that :SGB preservative treated timber had good termite resistance and decay resistance,its acute oral toxicity belonged to low grage.

Current Status on research and development of wood preservation technology,Light Organic Solvent Preservatives(LOSP) system,new wood preservatives as well as the application of treating process are reviewed in this paper.