Objective: To research the best processing method of Bupleurum chinense DC.by Orthogonal Test.Methods: With composite score of saikosaponin a,d as index, L9 (34) orthogonal table is decided with three factors: according to the amount of wheat bran, simmer pot temperature and simmer processing time , Orthogonal design was applied to study on the technology of processing Bupleurum chinense DC.fried with wheat bran.Results: The best processing method is as follows: each 100g Bupleurum chinense DC.plus 100g wheat bran simmer at 150 ℃ for 60 mi...