Method for identifying wild ginseng and garden ginseng and understory ginseng

The invention belongs to the technical field of traditional Chinese medicine identification, and particularly relates to a method for identifying wild ginseng, garden ginseng and understory ginseng byutilizing the content and proportion of ginsenoside components. The method comprises the following steps: detecting the contents of ginsenosides Rb1 and Ro in a ginseng sample, calculating the ratioof the Rb1 content to the Ro content (Rb1/Ro), and comparing the ratio of the Rb1 content to the Rb1/Ro content to distinguish wild ginseng, garden ginseng and understory ginseng. The specific judgment standard is as follows: when the content of Rb1 accounts for more than or equal to 0.6 percent of the weight of a sample and Rb1/Ro is more than or equal to 2.0, the sample is wild ginseng (forest ginseng with the growth age of more than or equal to 15 years), and garden ginseng cannot meet the two conditions at the same time; when Rb1/Ro is larger than or equal to 2.0, 80% or above of samples of the ginseng under forest