Through studying the separation and purification of Puerarin from Pueraria labota(wild) Ohwi,it was found that the effect of solvent concentration on the yield and the effect of hydrochloric acid concentration on the crystal purity of puerarin was obvious.Thus,the two factors were further studied and the results showed that by using 45% ethanol the extract yield was 2%;by using 5% hydrochloric acid the solution purity reached 95.8%.And the structure of extracted puerarin was respectively characterized by 1H...