The invention relates to a 
dioscorea opposita 
plant protein beverage and a preparation method thereof, especially to a preparation method for a health and 
dietary therapy beverage for three diseases such as high 
blood pressure, 
high cholesterol and high 
blood sugar. A technical scheme is that the beverage is prepared from the following raw materials according to corresponding steps, wherein the raw materials comprise, by weight, 4-5 parts of the 
dioscorea opposita, 4-5 parts of soybean, 8 parts of white granulated 
sugar, 0.5-0.8 part of 
arabinose, 0.5-0.6 part of a composite stabilizer, 0.2-0.25 part of a composite sour agent, and a proper amount of 
purified water. The 
dioscorea opposita 
plant protein beverage has the following beneficial effects that: the dioscorea opposita contains phlegmatic temperament, 
choline, 
vitamin C, 
dopamine, common yam 
rhizome base, 
saponin and the like, and contains various amino acids and various trace elements needed by 
human body; the dioscorea opposita is rich in 
zinc so as to provide treatment effects for diabetes and 
chronic renal failure; the dioscorea opposita is rich in 
cobalt and 
copper so as to prevent atherosclerosis and provide an effect of blood fat and 
cholesterol lowering; and the dioscorea opposita contains a large amounts of 
manganese, wherein the 
manganese is considered as a necessary element beneficial for elderly cardiovascular by 
World Health Organization, such that an anti-aging macrobiosis effect is provided.