Buckwheat slices are rich in tartary buckwheat flavonoids, mainly including rutin, quercetin, morin, camphene and other flavonoids. Rutin content accounts for 80% of tartary buckwheat flavonoids, which is much higher than that of common buckwheat and other crops. Tartary buckwheat flavonoids are water-soluble flavonoids, which are easily digested and absorbed in hot water at 90- 100℃. It contains a variety of vitamins, VPP is 2- 10 times that of corn flour and rice, VB2 is 8 times that of wheat, 25 times that of rice and 5 times that of corn.