The invention discloses a purple-potato and lily flour with the efficacies of calming the liver and improving the eyesight. The purple-potato and lily flour is prepared from the following raw materials in parts by weight: 6-8 parts of a nutritional additive, 40-50 parts of purple potatoes, 20-22 parts of locust honey, 8-10 parts of black peanuts, 3-4 parts of glutinous millet, 7-8 parts of pepper, 7-8 parts of grape seed oil, 4-5 parts of bamboo root shells, 1-2 parts of mustard, 7-8 parts of dry red wine, 7-10 parts of clam meat, 6-7 parts of ginger juice, 7-8 parts of dried chrysanthemums, 12-13 parts of lily tea, 10-15 parts of melon skin, 2-4 parts of garlic cloves, 2-3.4 parts of Chinese violet, 1-2 parts of evening primrose, 1-1.3 parts of gentiana apiata N. E. Brown, 2.3-3.1 parts of dalbergia and 2-2.4 parts of mulberry leaves. Because a variety of fruits and vegetables are used as raw materials to prepare the purple-potato and lily flour, the purple-potato and lily flour has a high nutritional value and a high health-care value. The Chinese violet has the efficacies of clearing away heat and toxic materials, cooling blood and relieving swelling, and the gentiana apiata N. E. Brown and the mulberry leaves have the efficacies of clearing away the lung heat, moistening dryness, calming the liver, improving the eyesight and promoting the circulation of qi and blood. The purple-potato and lily flour is particularly suitable for eating in summer.