The invention discloses a method for efficiently extracting active ingredients from radix puerariae, the active ingredients comprise 3 '-hydroxypuerarin, the extraction method comprises the following steps: S1,
raw material pretreatment: selecting dried radix puerariae tuberous roots, crushing and sieving with a 40-60-mesh
sieve, and the invention relates to the technical field of
plant active ingredient extraction. According to the method for efficiently extracting the active ingredients from the radix puerariae, through the synergistic effect of composite
solvent extraction and gradient purification, synchronous and efficient enrichment is achieved on trace 3 '-hydroxypuerarin and a
compound A in the radix puerariae, the extraction rate is larger than or equal to 15%, the extraction rate of the
compound A is larger than or equal to 85%, and the extraction rate is increased by three times or above compared with a traditional single
solvent extraction method; the total purity of the active ingredients is greater than or equal to 95%, the problems of low extraction rate of the target ingredients and difficult separation of impurities in the traditional process are solved, and the pharmacological activity of the 3 '-hydroxy
puerarin and the
compound A are synergistically enhanced, so that the application requirements of high-purity
plant source active ingredients are met, and a high-quality
raw material is provided for subsequent development.