Abstract:Objective: To explore the trait variation of a popular cultivar 'WEN85-5’ of Rehmannia glutinosa Libosoh.. Method: Comparison of main traits of four 'WEN85-5’ samples, Taking Catalpo, Polysaccharides and aqueous extracts as the evaluation indices of R. glutinosa. quality; The Correlation of Analysis on the main traits and quality. Result: The morphological variation of 'WEN85-5’ was significant; The species are bred, its traits are decreasing on the fertility, anti-disease and the quality With the increasing years. Conclusion: the variation of traits have influenced the yield and the quality of Redix Rehmanniae; The farmer should introduce the first cultivar or recover its traits.