Abstract: [Objective] To improve the quality standard of Chuanmei Sanhuang powder. [Method] Microscopic identification method was used to perform the microscopic characteristics identification of Rheum palmatum, Scutellaria baicalensis, Phellodendron amurense, Andrographis paniculate and Armeniaca mume. Thin-layer chromatography （TLC） was employed for qualitative identification of Rheum palmatum and Phellodendron amurense. [Result] Rheum palmatum, Scutellaria baicalensis, Phellodendron amurense, Andrographis paniculate and Armeniaca mume had obvious microscopic characteristics. High accuracy and good repeatability of Rheum palmatum in TLC assay was observed, while Phellodendron amurense had unsatisfactory performance. [Conclusion] The established identification method is simple, and has a good repeatability, which can be used to improve the quality standard of Chuanmei Sanhuang powder.

Key words: Chuanmei Sanhuang powder, microscopic identification method, thin-layer chromatography （TLC）, quality standard