The invention relates to a making method for crispy water chestnut slices with a milk aroma. The making method comprises the steps of 1, screening of raw materials; 2, slicing of water chestnuts; 3, blanching of slices; 4, ultrahigh pressure treatment; 5, freeze and thawing treatment; 6, immersion treatment; 7, combined drying; 8, cooling and packaging. The non-fried crispy water chestnut slices are sweet and crispy in taste, convenient to eat and rich in nutrition and has a good color, shape and degree of expansion; the product is safe, sanitary, quite fashionable, healthy and environment-friendly snack food. In the making process of the product, color-protecting food additives are not added, the vacuum freeze drying temperature, hot air drying temperature and microwave drying temperature are all lower than 100 DEG C, and the advantages that energy consumption is low, and the procedure is easy to operate are achieved; the product is easy to digest and absorb after being eaten, suitable for people of all ages and capable of being eaten immediately after packages are opened.