The invention relates to the field of health care beverages, and in particular to a longan seed alcoholic beverage. The longan seed alcoholic beverage is prepared from the following raw materials in parts by weight: 40-80 parts of longan seeds, 5-8 parts of mulberries, 2-6 parts of fructus perillae, 3-5 parts of herba ecliptae, 3-10 parts of eucommia bark, 2-5 parts of radix rehmanniae praeparata, 2-4 parts of rhizoma ligustici wallichii, 1-2 parts of rhizoma atractylodis, 5-7 parts of fructus rhodomyrti and 1-3 parts of alkakengi alkekengi. A preparation method comprises the following steps: a, raw material treatment: conducting primary treatment on the raw materials; b, traditional Chinese medicine extraction: extracting active ingredients of the traditional Chinese medicines (the raw materials); c, gelatinization: adding [alpha]-amylase to longan seed powder, and conducting liquefying so as to obtain a gelatinized material; d, saccharification: saccharifying the gelatinized material with the addition of a saccharifying enzyme; e, blending: adding water to regulate a sugar content, boiling an obtained saccharified material until the saccharified material becomes boiling, and preserving heat; and f, fermentation and soaking: fermenting the saccharified material with the addition of a beer dry yeast and fructus perillae powder; fermenting squeezed juice and residues with the addition of saccharomyces cerevisiae; then, mixing a fermentation product and a traditional Chinese medicine extracting solution, and keeping an obtained mixture so as to obtain the longan seed alcoholic beverage. According to the longan seed alcoholic beverage provided by the invention, the application of the longan seeds is widened, and the finished product (the longan seed alcoholic beverage) has a good health care effect.