The invention discloses nutritional potato chips and a preparation method thereof. The nutritional potato chips are characterized by being prepared from the following raw materials in parts by weight: 90-100 parts of potatoes, 25-30 parts of rye flour, 3-4 parts of salt, 4-5 parts of oligosaccharide, 1-2 parts of zinc citrate, 8-10 parts of lily mayonnaise, 10-11 parts of almond, 11-12 parts of peanut, 12-13 parts of sesame, 1-2 parts of burdock, 1.5-1.8 parts of lophatherum gracile, 0.8-1.5 parts of tangerine peel, 1.5-2 parts of cassia seed, 1-1.5 parts of angelica, 2-2.5 parts of broadbean flower, 2-3 parts of apple blossom, 2-3 parts of stellaria media and 3-5 parts of rapeseed oil. The nutritional potato chips have superior flavor, are crisp, refreshing, scientific in proportion of all the ingredients and rich in nutrition, and have the effects of dispelling wind and heat, regulating qi, strengthening spleen, drying dampness, eliminating phlegm, replenishing blood, improving eyesight, cooling blood, detoxifying, maintaining beauty and keeping young.