Method for separating rutin and quercetin from black tartary buckwheat

The invention discloses a method for separating rutin and quercetin from black tartary buckwheat. The method comprises the following steps: (1) providing a black tartary buckwheat primary product, (2)dispersing the black tartary buckwheat primary product into a methanol solution to form a primary product adsorption solution, adding the primary product adsorption solution into a polyamide resin adsorption column, primarily eluting the adsorption column with water, then carrying out primary elution by using a first ethanol aqueous solution, collecting eluent obtained when the lower-layer colored tape is eluted as primary eluent, finally, carrying out secondary elution by using a second ethanol aqueous solution, and collecting an eluent obtained when the upper-layer color band is eluted as asecondary eluent, and (3) concentrating and crystallizing the primary eluent to obtain a fagopyrum tataricum rutin product, and concentrating and crystallizing the secondary eluent to obtain a tartary buckwheat quercetin prod