Prunella vulgaris is the dry ear of Prunella vulgaris L., which has the effects of clearing the liver and purging fire, clearing the eye, dissipating swelling and swelling. It is used for redness and swelling of the eyes, headache and dizziness, and also has an inhibitory effect on Shigella.

The macroporous adsorption resin can effectively separate and purify the total flavonoids of Prunella vulgaris L., the process is simple, the safety is high, the resin can be regenerated, and the production cost is reduced by repeated use.