Objective: To evaluate the quality of Gansu merchandise Wen Codonopsis Radix with the fuzzy matter-element model. Method: Content of five main components in the samples of Wen Codonopsis Radix with different commercial grades from different origins were determined. Then the quality of Wen Codonopsis Radix was evaluated by the fuzzy matter-element model based on variation coefficient weight. Result: According to the value of Euclid approach degree

there were 18 batches of samples higher than 0.450

with higher evaluation degree

mainly coming from Wen county and Wudu district in Gansu. The samples of commercial grade two were generally at the very top in ranking. The comprehensive ranking was not depending on the commercial grade

but also greatly affected by place of origin. Conclusion: The method and model can be used to objectively evaluate the quality of Wen Codonopsis Radix

and can be used for the quality evaluation of other medicinal materials.