Abstract: Sample of treemoss concrete was graded by molecular distillation, and the graded distillates were introduced into the instrument and analyzed qualitatively and quantitatively. The results showed that 55 compounds in 3 grades of distillates were indentified, and the main compounds found were the following: 3-methoxy-5-methylphenol, divarinol monomethyl ether, ethyl everninate, methyl divaricatinate, benzoic acid, 2,4-dihydroxy-3,6-dimethyl-methyl ester, ethyl hematommate, ethyl 2,4-dihydroxy-6-methylbenzoate, ethyl divaricatinate, ethyl palmitate, ethyl oleate, linolenic acid ethyl ester and linoleic acid ethyl ester.