The invention relates to a common yam 
rhizome dew beverage, which is prepared from fresh common yam 
rhizome serving as a main 
raw material. The beverage consists of the following components in part by weight: 8 to 20 parts of common yam 
rhizome, 0.001 to 0.005 part of thermo-stable 
amylase, 5 to 8 parts of sweetener, 0.10 to 0.15 part of 
vitamin C, 0.10 to 0.38 part of stabilizer, 0.06 to 0.16 part of 
acidity regulator and 71.3 to 86.7 parts of 
purified water. A production method comprises the following steps of: protecting color, coarsely 
grinding, cooking, pulping, raising the temperature for gelatinization, performing enzymolysis, inactivating at a high temperature, blending, homogenizing, degassing and the like. Common yam rhizome 
dew furthest keeps the specific active ingredients and 
flavor of the common yam rhizome, makes the common yam rhizome more easily absorbed and utilized by human bodies, and increases the nutritional value of the common yam rhizome; and the beverage has fragrant and mellow 
mouthfeel, is tasty and refreshing and has the effects of 
quenching thirst, moistening the 
lung, invigorating the 
spleen, protecting the liver, disintoxicating, tonifying middle-jiao and qi, nourishing the heart, soothing the nerves, preventing atherosclerosis, building the bodies, beautifying and delaying senility. The production method ensures that the common yam rhizome 
dew beverage is not browned, precipitated and demixed.