GC-MS chromatograms were adopted to analyze different kinds of wood.The results show that there are distinct differences in the chromatograms of the different kinds of wood.While the total ion chromatograms of the same woods from different source are very similar.They have the same characteristic peaks and high coefficient correlation.Therefore,two kinds of ways are concluded to identify wood.The first one is based on the coefficient correlation.The woods can be considered as the same kind as long as owning coefficient correlation above 0.900.The second one is the way of characteristic components.Every kind of wood has its own characteristic components.So the total ion chromatogram or characteristic peak can be used for the wood identification.