The content of γ-amino butyric acid in the root of Phytolaccae acinosa Roxb.was determined by the method of ultraviolet visible spectrophotometry for the first time in this experiment,and a systematical research on the main factors and conditions for extracting γ-amino butyric acid was carried out by orthogonal experimental method.The conclusion is that the rate of extraction is highest when temperature is 60℃,300 milliliters of distilled water,root is extracted three times and each extraction for three hou...