A method for extracting a purple bergenia extractive, comprising: washing purple bergenia, picking out impurities from the purple bergenia, air-curing the purple bergenia, drying the purple bergenia at 35-50°C, and grinding the purple bergenia to 20-35 meshes, to obtain micro purple bergenia powder adding the micro purple bergenia powder to absolute ethyl alcohol, heating the micro purple bergenia powder and the absolute ethyl alcohol to 55-65°C, and performing ultrasonic treatment at 40-55 W for 20-40 min, performing ultrasonic treatment for 10-15 min after adjusting the power to 60-70 W, performing ultrasonic treatment for 5-10 min after adjusting the power to 50-55 W, performing ultrasonic treatment for 5-10 min after heating the micro purple bergenia powder and the absolute ethyl alcohol to 70-75°C, performing microwaving for 15-30s at 40-50°C, and performing filtering to obtain an extract solution concentrating the extracting solution at normal pressure to 1-1.2 g/cm3 in density adjusting pH to acidity at indoor temperature, performing heat preservation after heating the extracting solution to 65-70°C, to obtain a crude product by means of crystallization and adding the crude product to ethyl alcohol, then adding activated carbon for boiling, and performing filtering to obtain a purple bergenia extractive.Linvention concerne un procédé dextraction dextrait de Bergenia purpurascens, comprenant les étapes suivantes : laver le Bergenia purpurascens, retirer les impuretés du Bergenia purpurascens, faire durcir à lair le Bergenia purpurascens, sécher le Bergenia purpurascens à une température comprise entre 35 et 50 °C, et broyer le Bergenia purpurascens sur des mailles de taille comprise entre 20 et 35, pour obtenir une micropoudre de Bergenia purpurascens ajouter la micropoudre de Bergenia purpurascens à de lalcool éthylique absolu, chauffer la micropoudre de Bergenia purpurascens et lalcool éthylique absolu jusquà une température comprise entre 55 et 65 °C, et a
