[Objective] To optimize the extraction conditions of Sanguisorba tannins.[Method] With the content of Sanguisorba tannins and the yield of dry paste tannin extracts as the major evaluation indexes and the garlic acid as the control,the content of Sanguisorba tannins was determined by the UV-Vis spectrophotometry and the factors of particle size,solvent dose,percolation rate and diameter-height ratio were optimized.[Result] The RADIX SANGUISORBAE was pulverized and passed through the No.1 sieve,and then put ...