Objective: To determine and analysis the changes of main component from "Wuyao (Lindera)" to Vinegar "Wuyao (Lindera)". Methods: Volatile oil determination method in Pharmacopoeia appendix XD was applied to determine the content of volatile oil in different "Wuyao (Lindera)"; UV absorption spectroscopy was applied to determine the content of total flavonoids in different "Wuyao (Lindera)"; Acidic dye colorimetric method was applied to determine the content of total alkaloids,and compare the content changes of volatile oil, tot...