Abstract: Uses different extractant to heat and extract eleocharis tuberosa peel powder, optimizes the best extractant, on the basis of single factor experiment, orthogonal test is used to optimize the technological conditions; meanwhile, discusses the extracting effect of peel of different particle size and different production place. The results show that the extraction reaches the highest level under the conditions that the extractant is 36％ acetic acid, material－solution ratio is 1∶12(g∶mL), extracting temperature is 50℃, extracting time is 4 hours, for 2 times extracting; the extraction is more as the peel powder is smaller; through the comparision of peel produced in Hubei and Guangxi, illustrates under different extracting condictions, the production place of peel has influence to extract.

Key words: extraction of eleocharis tuberosa peel, extracting condition, extracting rate