The invention discloses a solid beverage for treating diabetes and a prerparation method thereof. The solid beverage comprises germinant brown rice flour, small molecular peptide, cyclocarya paliurusextract, phylloporia ribis fermented mycelium, corn stigma extract, mulberry leaf extract, tartary buckwheat extract, lecithin, poria cocos extract, ampelopsis grossedentata leaf powder, calcium beta-hydroxy-beta-methylbutyrate, L-carnitine, magnesium oxide, vitamin C, taurine, zinc gluconate, niacin, vitamin E, pantothenic acid, vitamin B1, vitamin B2, vitamin B6, vitamin B12, vitamin A, folic acid, vitamin D3, and additives. The beverage has the effect of inhibiting the rise of blood sugar, can help diabetic patients get rid of the problem of insulin injection, can gradually replace insulin,and help the patient get rid of dependence on the insulin and western medicines, thereby avoiding the side effects of the insulin.