Preparation method of wild buckwheat rhizome extract containing rutin and luteolin active ingredients

The invention discloses a preparation method of a wild buckwheat extract containing rutin and luteolin active ingredients. The preparation method is characterized by comprising the following steps: 1)drying green branches and leaves of wild buckwheat, crushing and sieving to prepare wild buckwheat superfine powder; 2) adding distilled water into the wild buckwheat rhizome superfine powder, soaking, and performing water-bath extraction; 3) centrifuging the extract, collecting a supernatant, and repeatedly extracting filter residues for multiple times; 4) drying the supernatant to obtain the wild buckwheat extract, and 5) taking a proper amount of the wild buckwheat rhizome extract, and determining the active ingredients of the wild buckwheat rhizome extract through a gas chromatography-mass spectrometry technology. Different from other patents, a solvent used for extracting is water, organic solvents are adopted in the other patents, follow-up residues and solvents can be discarded after being subjected to org