The extraction process of flavonoid from hawthorn was optimized with hawthorn fruit,extraction time,ethanol concentration and the material liquid ratio as the main influence factors,flavonoid of hawthorn extraction as an index for research. On the basis of single factor experiment,optimized by response surface analysis,the best extraction conditions for extraction were: liquid ratio was 1 ∶6,ethanol concentration was 60%,thermal extraction time was 80 min. Under the condition the flavonoid extraction rate r...