The invention relates to an establishment process of a judgment method for
purebred similarity of
dendrobium officinale, a judgment standard and the judgment method. The establishment process of the judgment method comprises the steps of S1, collecting
dendrobium officinale samples consistent with a
gene sequencing conclusion, and measuring the stem
diameter of each sample; S2, carrying out normality test on a stem
diameter variable of each sample; and S3, obtaining standard intervals: if a result obtained in the step S2 obeys normal distribution, obtaining a 95%
confidence interval of a meanvalue and a 95%
confidence interval of a standard deviation according to an overall calculation formula of the normal distribution, wherein the confidence intervals can serve as standard ranges for identifying the purity of unknown samples. The judgment standard established according to the actually collected data is that the 95%
confidence interval of the mean value and the 95% confidence interval of the standard deviation are (5.8079, 6.3227) and (0.9256, 1.2954) respectively, and the tested
dendrobium officinale samples only need to be compared with the intervals. According to the method disclosed by the invention, the purity of the variety of the
dendrobium officinale can be identified through the morphology-related characteristics of the
dendrobium officinale, so that the value of theartificially planted
dendrobium officinale or whether the value of the artificially planted dendrobium officinale is existent or not can be simply judged; and the method is high in identification accuracy, and has important practical significance.