The invention discloses a donkey-hide gelatin cake and a preparation method thereof. The donkey-hide gelatin cake is prepared from the following raw materials in weight: 400-600g of donkey-hide gelatin, 400-600g of yellow wine, 200-300g of Chinese dates, 400-600g of walnut kernels, 400-600g of black sesame seeds, 200-300g of black dates, 45-60g of honey, 40-60g of brown sugar, 10-20g of angelica, 10-20g of white peony roots, 10-20g of prepared rehmannia roots, 25-35g of astragalus roots, 25-35g of codonopsis pilosula, 25-35g of licorice roots and 500-700g of clean water. The donkey-hide gelatin cake is prepared from a variety of raw materials, such as donkey-hide gelatin, yellow wine, Chinese dates, walnut kernels, black sesame seeds, honey, angelica, white peony roots, prepared rehmannia roots, astragalus roots, codonopsis pilosula and licorice roots, is free of side effects, can be used for enriching blood, beautifying face, nourishing blood, nourishing Yin to moisten dryness and postponing senescence, is particularly suitable for female over the age of eighteen and can play an effective role in health care; according to the preparation method, the prepared donkey-hide gelatin cake is preservative-free, the preparation process is simple and convenient, the automated production-line production can be realized, and the production efficiency is high.