Objective: The aim of this article was to provide basis for grading of Coptis Rhizoma pieces through with the inner quality and appearance features of Coptis Rhizoma pieces. Method: Eighteen batches of Coptis Rhizoma pieces were selected as analysis object

subjected to measurement of the size (length

width

thickness and weight)

color (external color

internal color)

and content (table of berberine

hydrastis

martin

berberine). Then SPSS cluster analysis was conducted based on the measurement results. Result: Qualified ones were divided into two grades:superior class and ordinary class. Conclusion: Inner quality evaluation and appearance feature quantification can be used to classify Coptis Rhizoma pieces through the mathematical statistics analysis.