Objective:To optimize the extracting process of Er-xian decoction.Methods : The contents of flavonoids,alkaloids,saponins and yield of dry extract were taken as indexes,extracting with different concentration ethanol by Soxhlet extraction was observed,the optimum extraction conditions were investigated by the ethanol refluxing with orthogonal.Results: The optimum ethanol refluxing is better than soxhlet extraction,the condition obtained was:60% ethanol,with the volume of 10 folds,refluxing and extracting fo...