In this paper, The benzene-ethanol extraction contents of the leaves, sprig and bark of eight different species on the Maoer Mountain region, the similarities and differences about the extraction contents of the different parts of the same species and the different tree species were studied, and attempted to analyze the reasons for the differences, in order to provide a reference for the fire tree species selection and forest fire prevention. The results showed that the extraction contents of leaves, sprig and bark parts of the same species did not differ greatly, the extraction contents of the different species showed significant difference, Korean Pine had the highest extraction content, Mandchur Ash and Manchurian Walnut Maxim had the lower extraction content, the variation range of the extraction contents was 8.01%~20.69%, and the extraction contents of the conifer species were significantly higher than the broad-leaved tree species. As far as benzene-ethanol extraction is concerned, Korean Pine was most burnt. Mandchur Ash and Manchurian Walnut Maxim was relative fire-retardant. And the conifers was more relatively easy to burn than the broad-leaved trees. The fire-retardant tree species could be considered as the fire protection tree species, such as, Mandchur Ash and Manchurian Walnut Maxim.