Abstract:Huyou is rich in nutrient value，and the flesh has been developed and utilized.Its peel is also rich in nutrients and can be further developed and utilized to improve the utilization value of Huyou.The extracting rate of the obtained total flavonoids was determined by using the Huyou peels as a raw material by adding a surfactant to assist extraction in an ultrasonic extraction environment.On the basis of single factor experiment，the four-factor and three-level response surface test design was used to optimize the extraction conditions.The results showed that the sodium dodecyl sulfate（SDS）mass fraction was 2.0% and the ultrasonic time was 22 min at the extraction temperature of 40℃.Ethanol concentration was 77%，the ratio of material to liquid was 1 ∶40（g/mL），the highest extraction rate of total flavonoids could reach 1.97%.