Traditional disinfection treatment on herbal medicines are cobalt 60, ethylene oxide, alcohol, microwave, ozone and etc. However, it is difficult to ensure drug properties due to chemical residues, or the cost is expensive. After repeated process verification, AIKSMED found steam sterilization is the most suitable method for herbal medicines MZY series chamber is horizontal rectangular structure. It is designed with a unique moisture-proof device powder agglomeration is traditional steam sterilization can be avoided.