Astragalus is the dry root of perennial herbaceous legumes. Astragalus saponin is its main component, and total saponins of Astragalus membranaceus have effects such as anti-inflammatory, analgesic, blood pressure lowering, anti-myocardial hypoxia, and sedation.

The resin adsorption method for extracting astragalus has the advantages of simple operation, no pollution, low cost, etc., and can be regenerated and reused, so it is widely used for the extraction and purification of total saponins of astragalus