As the most abundant renewable forestry resource in South China, Eucalyptus urograndis wood is most suitable for bioenergy. Therefore, Py-GC/MS was used to analyze the components from pyrolysis products of Eucalyptus urograndis wood. After treated with freeze-drying, the comminuted power of Eucalyptus urograndis wood was pyrolyzed in He atmosphere at 590 □, then the pyrolysis product was analyzed by online linked GC/MS. Relative content of each component was determined by area normalization, and 38 compounds representing 99.35% were identified. The main and abundant constituents were arbon...