The invention discloses yacon ice cream and a manufacturing method thereof, wherein, the yacon ice cream comprises whole milk powders accounting for 12 to 15 percent, unsweetened evaporated milk accounting for 6 to 9 percent, cream accounting for 7 to 9 percent, white granulated sugar accounting for 3 to 4 percent, starch syrup accounting for 1 to 1.5 percent, sodium alginate accounting for 0.15 to 0.2 percent, monoglyceride accounting for 0.15 to 0.2 percent, yacon granules accounting for 20 to 25 percent and appropriate drinking water. The manufacturing method of the yacon ice cream comprises the steps of yacon granule preparation, raw material mixing preparation, sterilization, homogenizing, cooling, ageing, congealing, filling, rigidification and the like; the yacon ice cream contains yacon granules, achieves cool and delicious taste, achieves double functions of nourishment and health care, and further achieves the nourishment and health care effects of reducing temperature, relieving summer-heat, clearing intestines and stomach, resolving liver toxicity, reducing blood fat, reducing blood pressure, helping digestion, preventing oxidation, preventing constipation and the like compared with the traditional ice cream.