Anti-inflammatory agent and application thereof

[0024] 1. The preparation method of Houttuynia cordata extract is as follows:

[0025] Weigh Houttuynia cordata, dry and crush it into powder, add methanol with a volume fraction of 60% according to the ratio of solid to liquid 1:20, and extract at a temperature of 80-95°C for 1-2 hours, stand at room temperature for 15 minutes, filter, and then rotate The evaporator is concentrated, and after vacuum drying, the Houttuynia cordata extract is obtained.

[0026] 2. The preparation method of elderberry oleanolic acid is:

[0027] Take fresh elderberry, dry it, crush it into powder, add 10-15 times the amount of 95% ethanol, ultrasonically extract it for 1-2 hours, filter it with suction, add 5-8 times the amount of 95% ethanol to the filter residue, and ultrasonically extract it for 1 hour, 4800r Centrifuge for 10 min at 10 min, get the supernatant concentrated, filter with suction, combine the two filtrates, recover ethanol under reduced pressure until the filtrate reaches 1 / 4 o