Eucalyptus camaldulensis biomass has been widely used in fiber and pulp. However, this would result in serious water pollution and meanwhile bring a great waste of biological resources. Therefore, the ether/acetone extractives of Eucalyptus camaldulensis biomass were identified by Py-GC/MS. The main 350°C pyrolysis components were 7-Oxabicyclo[3.3.1]non-2-ene, 8-(4-methoxyphenyl)- 2,4,9-trimethyl- (7.1%), Indolo[2,3-b]quinoxaline, 1-fluoro(4.23%), etc. The main 550°C pyrolysis components were 7-Oxabicyclo[3.3.1]non-2-ene, 8-(4-methoxyphenyl)-...