Objective:To optimize water extraction technology of total flavones from Crataegus pinnatifida. Method: Taking yield of total flavonoids as index

the content of total flavonoids was determined by UV

orthogonal test method was used to optimize ultrasonic extraction technology of total flavonoids with extraction time

ratio of solid-liquid

extraction temperature and powder size as factors. Result: Influence sequence of 4 factors on soaking technology was:extraction temperature>powder size>extraction time>ratio of solid-liquid

optimum extraction technology was as following:extraction temperature 95℃

ratio of solid-liquid 1:300

extraction time 10 min

gringing degree 60 mesh

average yield of total flavonoids could be up to 9.36 g·L-1. Conclusion: Optimized water extraction condition was stable and feasible

it could be used for taking of C. pinnatifida teabag.