The invention relates to an ultra-low calorie health-care type soluble drink mate and a preparation method thereof. The drink mate comprises the following food raw materials and food additives in percentage by weight: soyabean lecithin, sodium casseinate, grape seed extract (containing more than or equal to 30 percent of grape polyphenol and more than or equal to 60 percent of oligomeric proanthocyanidins in percentage by mass), stevioside containing more than or equal to 80 percent of RA, sodium stearoyl lactylate, molecular distilled monoglyceride, sodium citrate, disodium hydrogen phosphate, sodium alginate, carrageenan, edible essence, silicon dioxide, and the like. The preparation method comprises the following steps: blending the materials, dissolving, emulsifying, homogenizing, spray drying, cooling regularly, sieving, metering and packaging. The invention has simple process, stable product quality and high nutritional value. The ultra-low calorie health-care type soluble drinkmate integrates the nutritional values of the soyabean lecithin, the stevioside containing more than or equal to 80 percent of RA, the sodium casseinate and the grape seed extract, has unique taste, smooth and fine mouthfeel and thick fragrance, does not contain trans fatty acid and is a novel ultra-low calorie health-care type soluble drink mate.