Objective: To establish the optimal extraction technology of forsythiaside by orthogonal test. Method: The amount of water

extraction time

extraction times and extraction temperature were set as index for orthogonal test. Result: The factors were: C > A> B> D . Extraction times ( C ) was as the main factor and the amount of water ( A )

extraction time ( B )

extraction temperature ( D ) as a secondary factor. The optimum conditions for extraction was as follows: 16 times of water

soaking extraction 3 times at 60 ℃

each time extracting for 1 hour. Conclusion: The optimum extraction process for forsythiaside was simple

stable and feasible.