Cineraria repanda capsule and preparation method thereof

The present invention belongs to the medical technical field, and particularly relates to a cineraria repanda capsule and a preparation method thereof, the cineraria repanda capsule includes a cineraria repanda extract, the cineraria repanda extract is prepared by the following methods: 1) cineraria repanda is taken, and added with water for boiling, and a dry paste I is obtained by filtering, concentrating and drying under reduced pressure of the decoction solution; 2) cineraria repanda with the same weight of the cineraria repanda in the step 1) is taken, added with ethanol for reflux for tow times, and filtered, the filtrates are combined, the ethanol is recovered, and a dry paste II is obtained by drying under reduced pressure; and 3) the dry paste I and the dry paste II are merged, ethanol is added for ultrasonic cycle extraction, and the extraction solution is filtered and concentrated into a thick paste, namely the cineraria repanda extract. Through the method, the cineraria repanda is divided into two parts, one part of the cineraria repanda is added with the water for boiling, the other part of the cineraria repanda is added with the ethanol for reflux for extraction, dry pastes are obtained respectively, and then merged, the ethanol is added for ultrasonic cycle extraction, the extraction rate of total flavonoids in the cineraria repanda extract is greatly improved, and the bacteriostasis effect is significantly better than that of the prior art.