Polygonatum particle and preparation method thereof

The invention aims to provide a polygonatum particle and a preparation method thereof. The method is to treat polygonatum, and obtain a crystal solid particle product by adoption of the technology of extraction, filtration, primary concentration through a nanofiltration membrane, continuous concentration through a centrifugal membrane evaporator, belt-type low temperature continuous drying, crushing, packaging and the like. The product has the advantages of low cost, novel technology and good quality, reserves most part of active substances of the polygonatum, and can be subjected to industrialized large-scale production.