黄芪(Radix Astragali)是一种常用中药,具“补元气,益卫气,通达肌肉纹理,而滋养全身”的功效。主要药效成分为皂苷和多糖[1],但多糖成分易吸潮,可导致其制剂受潮、变软、黏结和霉变。粉末包衣技术能将药物粉末经流化床造粒后(粒径为80～180μm)再包衣,以改善粉末的流动性、可 Radix Astragali is a kind of commonly used traditional Chinese medicine, which has the effect of nourishing the body, nourishing qi, invigorating the muscle texture and nourishing the whole body. The main pharmacodynamic ingredients are saponins and polysaccharides [1], but polysaccharides easily absorb moisture, can lead to dampness, softening, sticking and mildew. Powder coating technology can be after the drug powder granulation fluidized bed (particle size of 80 ~ 180μm) and then coated to improve the fluidity of the powder can be