Abstract: Taking Pueraria edulis from different places in Yunnan Province, Guangdong Province and Guangxi Zhuang autonomous region as materials, the medicinal materials of Pueraria edulis were extracted by ethanol condensation reflux extraction and ultrasonic-assisted extraction, and the effects of different extraction methods the contents of total flavonoids in Pueraria edulis from different areas were compared. The results showed that the best extraction time of Pueraria edulis in Yunnan Province was 20 min, and that in Guangdong and Guangxi Zhuang Autonomous Region was 30 min. The yield of total flavonoids from Pueraria edulis extracted by the condensation reflux extraction method was relatively better. The content of total flavonoids of Pueraria edulis in Yunnan was the highest with an average content of 0.255 7%, while the average content of total flavonoids in Pueraria edulis in Guangdong was the lowest with an average content of 0.210 8%.

Key words: Pueraria edulis, total flavonoids, condensation reflux extraction method, ultrasound-assisted extraction