The invention discloses a traditional Chinese medicine composition for strengthening brain and soothing nerves and a preparation method thereof. The traditional Chinese medicine composition consists of the following components in parts by weight: 15-30 parts of polygala tenuifolia, 6-30 parts of seeds of wild jujube, 30-500 parts of fresh longan, 6-50 parts of nuts, 10-50 parts of fructus alpiniae oxyphyllae, 10-80 parts of cherries, 5-30 parts of fructus schisandrae, 10 parts of irkutsk anemone rhizome, 6 parts of prepared rehmannia root, 6 parts of asparagus cochinchinensis, 6 parts of ligusticum wallichii, 5 parts of polygonum multiflorum, 5 parts of poria with hostwood, 5 parts of radix pseudostellariae, 5 parts of cyperus rotundus, 6 parts of Chinese yam, 7 parts of raw rhizoma polygonati, 8 parts of polygonatum odoratum, 4 parts of dendrobe, 7 parts of lucid ganoderma, 7 parts of liquorices, 12 parts of crataegus pinnatifida, 8 parts of mint, 13 parts of radix ophiopogonis, 120 parts of phragmites communistrin, 7 parts of medlar, 2 parts of Chinese olives (without cores), 16 parts of Japanese ginseng leaves, 120 parts of sugarcane, 120 parts of pears, 40 parts of red dates, 45 parts of rhizoma imperatae, 20 parts of malts, 4 parts of gingers, 4 parts of old tea, 9 parts of astragalus membranaceus, 7 parts of white atractylodes rhizome, 25 parts of dried waterlily leaves, 7 parts of medicated leaven, 10 parts of tremella, 5 parts of lilies, 5 parts of platycladi seeds, 5 parts of lotus seeds, 80 parts of water chestnuts, 10 parts of siraidia grosvenorii, 4 parts of lemons, 3 parts of fructus amomi, 3 parts of fructus caryophylli and 5 parts of radix glehniae. The traditional Chinese medicine composition disclosed by the invention has effects of calming heart, nourishing blood, soothing nerves and improving cardio-cerebral nerves.