The invention discloses purple sweet potato chips for relieving restlessness and nourishing kidney. The purple sweet potato chips disclosed by the invention are prepared from the following raw materials in parts by weight: 250-260 parts of purple sweet potatoes, 17-18 parts of black sesame, 20-25 parts of caraway, 7-8 parts of nutrition additives, 6-7 parts of banana pulp, 7-9 parts of black chicken bones, 10-11 parts of passion flower, 4-5 parts of black soybean meal, 14-16 parts of peanut sauce, 5-6 parts of mint oil, 8-11 parts of hawthorn fruits, 8-9 parts of hericium erinaceus, 4-5 parts of pork skin, 1.6-2.2 parts of diospyros lotus, 1.9-2.3 parts of tuber fleeceflower stem, 1.5-2.1 parts of gynostemma pentaphylla, 1.5-2 parts of rehmannia flower, 1.3-2 parts of mint, and 1.6-2.1 parts of eupatorium. The purple sweet potato chips disclosed by the invention are simple in process and low in production cost, and is endowed with rich nutrition of the purple sweet potatoes; and furthermore, the added food and medicinal materials including black sesame, hericium erinaceus, rehmannia flower, diospyros lotus and the like are high in pharmacological effect, moderate in property and flavour and rich in nutrition, and therefore, the purple sweet potato chips disclosed by the invention can be used for improving immunity, have the effects of tonifying spleen and qi, nourishing kidney, quenching thirst, clearing heat, relieving restlessness and the like, and are the best health food suitable for people of all ages.